Add a serial number in front of it, which is the document you quoted. The format is: [number]. Note that [] is in English, don't make it. Write the main author, and if it is an international/national standard, write the standard code. After that, put a dot. Be careful not to put a period. Then write the document name of the reference document, and then write the type of your document. The format is: [type].

Format codes can be divided into:

Monograph [M], conference proceedings [C], newspaper articles [N], journal articles [J], dissertations [D], reports [R], standards [S], patents [P], precipitation documents in the collection of papers [A], and magazines [G].

Types of electronic documents: database [DB], computer [CP], electronic bulletin [EB]

The carrier types of electronic documents: Internet [OL], CD [CD], magnetic tape [MT] and disk [DK].