What do M, J, and A in the literature stand for?

M: Monograph, J: Journal, A: Precipitation literature in the collection of papers.

Document types include the following:

Reference types: monograph [M], collection of papers [C], newspaper article [N], journal article [J], dissertation [D], report [R], standard [S], patent [P], extracted documents in the collection [A]

Electronic document types: database [DB], computer [CP], electronic bulletin [EB]

Types of electronic document carriers: Internet [OL], optical disk [CD], magnetic tape [MT], disk [DK]

Monographs, proceedings, dissertations, Report Reference Instructions

[Serial Number] Main Responsible Person. Document Title [Document Type Identification]. Place of Publication: Publisher, Year of Publication. Starting and Ending Page Numbers (Optional).

[ 1] Liu Guojun, Chen Shaoye, Wang Fengzhu. Library Catalog[M]. Beijing: Higher Education Press, 15-18. 1957.

[2] Xin Ximeng. Proceedings of the International Symposium on Information Technology and Information Services: Set A [C]. Beijing: China Social Sciences Press, 1994.

[3] Zhang Zhusheng. Invariant sets of differential semidynamic systems [D]. Beijing: Institute of Mathematics, Department of Mathematics, Peking University, 1983.

[4] Feng Xiqiao. LBB analysis of nuclear reactor pressure piping and pressure vessels[R]. Beijing: Tsinghua University Nuclear Energy Technology Design Institute, 1997.

[5] Gill , R. Mastering English Literature[M]. London: Macmillan, 1985.

The above content refers to Baidu Encyclopedia - References