Format: [serial number] Principal. Document Title [Document Type ID]. Place of publication: publisher, year of publication. Starting and ending page numbers (optional)

For example: Liu Guojun and Chen Shaoye. Library catalogue [M]. Beijing: Higher Education Press,1957.15-18.

References in books are often marked with square brackets and letters, such as [M]. When writing an article, the author should mark references, which are identified by a single letter according to GB3469-83 "Document Types and Document Carrier Codes".

Thesis annotation

M- Monographs (including works on history and chronicles in ancient books)

Essays

Newspaper articles

Journal articles

Doctoral dissertation

R- research report

S standard

patent

A—— Precipitated documents in monographs and papers.

Z—— Other unspecified literature types

Electronic document types are identified by two letters:

database

computer program

Electronic bulletin