The first is the sequential coding system, in which the number of contributions [1][2][3] is quoted in the order in which the cited documents appear, and the positions cited in the paper are marked with serial numbers in the form of standard;

An example of a single document referenced by the sequential coding system is as follows:

The second is the author-publication year system, in which the content of each document is marked with the author's surname and publication year and placed in "()". If the author's name is mentioned in the text, the year of publication is recorded in the brackets below. Articles are sorted by author's name. In this case, the list of references is unnumbered. This is also the way the subject adopts.

The author-year of publication cited examples of single literature are as follows:

Author-publication reference format is as follows:

Attachment: the method of quick sorting by first letter in Word;

1. Press Ctrl to open the function menu, and then open the Add Bookmark form;

2. Create a bookmark in the previous paragraph of the reference list: _ refsstartloc

3. Create a bookmark in the paragraph after the reference list: _ refsendloc

4. Press Ctrl to open the function menu, and then open the "Document List Sorting" form;

5. Select from the "Document List Sorting" form: user-defined order, English priority, ascending Chinese order and ascending English order, and then click the "Update List" button to update the sorting in the document list;

6. Finally, click the "Start Sorting" button in the "File List Sorting" form to complete the quick and automatic sorting of the reference list.