Usually, if the reference document is a periodical paper, the page number information is the starting and ending page number of the periodical where the document is located, that is, the total page number. It is not necessary to be accurate to the page number of a specific reference. If the reference is a book or monograph, the page number information of the reference is the page where the specific quoted content is located.

Literature is books, periodicals and laws with historical significance or research value. The most important thing is that it is divided into printing type, miniature type, machine-readable type and audio-visual type according to the carrier:

1, printing type: it is the most basic way of literature, including lead printing, mimeograph, offset printing, lithograph and other materials. Advantages: you can read directly, which is convenient and fast.

2. Microfilm: A document based on photosensitive materials, which is divided into microfilm and microfiche. Its advantages are small size and easy storage, transfer and transmission. But you must use a reader when reading.

3. Computer readable: It is the latest form of carrier. It mainly converts files into symbols and machine language through coding and programming, inputs them into computers, stores them on magnetic tapes or disks, and then outputs them by computers when reading. It can store a large amount of information, organize it in any form, and extract the required information from it at a very fast speed. The emergence of e-books belongs to this type.

4. Audio-visual type: also known as direct-view type or audio-visual type, it is a file recorded on the carrier in the form of sound and image, such as records, audio tapes, video tapes, high-tech movies, slides, etc.