According to national standards, references should be quoted in a certain format, among which different types of references need to be distinguished, that is, by letters. Common types of letters of recommendation are:
1, monograph [M], collection of essays [C], newspaper articles [N], journal articles [J], dissertations [D], reports [R], standards [S], patents [P], and documents deposited in papers [a];
2. Types of electronic documents: database [DB], computer [CP], electronic bulletin [EB]
3. Carrier types of electronic documents: Internet [OL], compact disc [CD], magnetic tape [MT] and magnetic disk [DK].
Extended data:
For English references, we should also pay attention to the following two points:
(1) Author's name adopts the original principle of "surname comes first, surname comes last", and the specific format is: surname, initials of first name. For example, Malcolm Richard Cowley should be Cowley, M.R. If there are two authors, the way of the first author remains the same; After that, the first letter of the second author's first name is put in front, and the last name is put behind. For example, Frank Norris and Owen Gordon should be: Norris, F.&; Mr Gordon
(2) Titles of books and newspapers are in italics, such as Mastering English Literature and English Weekly.
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