Direct citation refers to recording the contents of the cited document according to the description in the original reference. The actual file format can be divided into two situations: when the cited document is a detailed statement, if the original author's name, cooker and colon are all acceptable, the last punctuation of the statement is within the colon, and the reference code of the paper is marked at the upper right outside the colon; If only the full text is introduced.

There is no _ author's name and sentence in front, only _ colon, and the reference code of the paper is also marked on the upper right outside the colon, but the last punctuation of this reference must be marked on the lower right outside the reference code of the paper. When the reference file is a non-detailed sentence, if the reference file only contains a word, phrase or even a detailed sentence, it is only used as a part of the description sentence, then the reference mark code should be immediately after the preceding colon and before the dot.

2. Italian quotations.

In general, the reference contribution number of the cited paper is not unique in the original text, and can be selected in many ways.

(1) Mark the author of classic works or cited documents. When describing the contents of the cited document (excluding direct reference), if the author's name of the cited document is written, the identification code will be marked on the upper right of the author's name in the form of corner mark; When describing the cited literature, if it is written as the name of the classic work, or the name of the author and the name of the classic work, the identification code shall be marked at the upper right of the name of the classic work.

(2) Mark the data information, viewpoints and basis dissolved in the cited documents. If _ has the name of the author who has written classic works or cited documents, and only the relevant data and materials or original materials in the reference of the paper are introduced in the original text, and some of the introduced documents do not constitute sentences, the reference code should be immediately marked at the upper right of the relative words or phrases. If the cited documents express their understanding in their own sentences, the reference mark code should be marked in the upper right corner of the last word of the sentence before the dot.