Journals don't necessarily have volumes and issues. If not, you can write references in the following format: author, article name [document number], publishing house, date (year, month): which page? References are continuously coded with Arabic numerals in the order in which they appear in the text, and the serial numbers are placed in square brackets. If the file is referenced repeatedly, it is marked with the same serial number in the text. For documents cited for many times, list the page number or page number range of each place in the serial number mark of each reference, put it in square brackets and mark it with superscript. If the serial number of a reference appearing as text needs to be followed by a page number or page number range, the page number or page number range should also be superscript. Authors and editors need to carefully check the serial numbers of references under the sequential coding system, so that the serial numbers are consistent with the list of references after the marked documents are exactly the same. In addition, the reference page number or page number range should also be accurate.