In the paper, if other documents are quoted completely, they must be quoted and explained in the notes. If you don't fully quote, you don't need to quote.
The function of quotation marks is to directly quote other people's words, books, dialogues, etc. In an article. Quotes should be used to distinguish the quoted words from the author's words. A quotation can be a part of a word, a word, a sentence or all of it.