When writing a paper, you can use other people's articles when marking references. Many literature titles have [] written in capital letters after them. What does this mean? ! !

These are the country’s standard codes for different types of references.

For example, journal citations are [J] journal articles

For example: Zhang San. On the development of small and medium-sized enterprises [J]. Humanities Research. 2005, 5(6): 52

I am talking about the author of the article Zhang San. The title is on the development of small and medium-sized enterprises. It is a journal document from the journal Humanities Research. It was published in 2005. It is Volume 5, Issue 6 of the journal. The citation is from the revised journal article No. 52. Page.