In the dialogue between characters, when the title of a book is mentioned, should it be typed out or in single quotation marks (')?

The forms of titles are "double titles" and "single titles".

Title of the book, article, newspaper, publication, etc. , are marked with the title of the book.

A) The author of A Dream of Red Mansions is Cao Xueqin.

B) Have you read Kong Yiji by Lu Xun?

His article was published in People's Daily.

There is a book "The Language of China" on the desk.

When the book title is still used inside, the outer layer uses double titles and the inner layer uses single titles.

For example, the preface of China Workers was published on February 7th, 1940.

But in actual use, the title of the book has gone far beyond this range, and titles of movies and TV series are often used, such as:

(l) I once went to see Roman Holiday with the girls in the dormitory ... (Southern Weekend, 22nd edition, April 7th, 2004).

(2) Liang Congjie bluntly said: The TV series April Day on Earth is a double distortion of historical facts and cultural spirit. (Title "China Reading Newspaper", fifth edition, May 2000 10)

The title or title can also be abbreviated or combined, because it is also a title, which is equivalent to the full name in people's minds. The function of book title is to distinguish between book title and non-book title and avoid misunderstanding. Some people use quotation marks instead of book titles, so the burden of quotation marks is too heavy. Judging from the actual use at present, most publications add the title after the abbreviation of the title or article. For example:

(1)1June 9961People's Republic of China (PRC) national standard punctuation usage (general usage) is not clearly defined. (Language Construction, No.2, 2000, p. 15)

(2) Modern Chinese Dictionary (1978) has added many new words ... Of course, these conditions of modern Chinese have been greatly improved in the revised edition. (Language application 1999 1 page 105)

(3) Do dolls need to read The Four Books and Five Classics (Family Education, No.3, 2004) today?

In addition, TV programs sometimes use titles, such as:

(1) Economic Channel has launched many special columns in a large number of well-known brand columns, such as Economic Half-hour, Economic Information Network, Lucky 52, Happy Dictionary, Dialogue and Life, which has formed a brand effect. (People's Daily)

(2) The evening leading columns "Economic Half-hour" and "Economic Information Network Broadcasting" together with the newly opened morning column "First Time" and the midday column "Global Information List" form the main line of the economic channel; The service section includes life, frontier, healthy road, serving you and providing meticulous life service for the audience. (People's Daily)

This usage has been widely recognized by people. In addition, the titles of plays, songs, music, paintings, sculptures, photography and other works can also be marked with titles. The role of book titles has been expanded to represent the names of various works (including works expressed by words, sounds, images, actions, etc.). However, we can't expand the scope of book titles at will, such as product name, prize name, organization name, activity name, course name, conference name, etc.