1, APA format: APA (American Psychological Association) is a format for expressing reference sources, which is mainly used for academic standards such as social sciences and is also adopted by many domestic journals.

The format of references in APA is "(author's surname, year of publication)".

The format of bibliography at the end of APA is: bibliography, which must be arranged alphabetically by surname, and its basic structure is:

Periodical category: author's publication year, article name, periodical number/issue number: Smith, J. (2006). The title of the article. The title of the journal, 1, 10 1- 105.

Non-periodical category: author's publication year, title and place of publication: Sussan.g. (2002). What computers can't do. New york: Harper &; Row 7.

2.MLA format: MLA is a paper guidance format formulated by the American Modern Language Association, which is mostly used in liberal arts.

The basic format of comments in MLA text is "(author's surname, document page number)".

Bibliographic format at the end of MLA: works cited in MLA format are also arranged alphabetically by surname. The basic structure is as follows: