The fonts of English paper references are different from the main text, because some English-related contents need to be written in English special fonts, among which Roman fonts are all English fonts.

Then, the Chinese words in the text content should use Song Like Ti font, and the font size is also somewhat different.

In addition, if you want to cite relevant English papers in the references, you should use different font sizes, different fonts or whether the fonts are bold. Therefore, the fonts and texts of Chinese and English references in papers are different, and the writing rules of most papers are like this.