How do you use parentheses correctly?
Parentheses can include almost any information within them. What's important to remember is that the sentence must still make sense if the information inside the parentheses is taken out.
In scholarly writing, such as APA writing, parentheses usually are used to introduce an acronym that will be used in the rest of the paper in place of a full name, such as the American Psychological Association (APA).
Parentheses are also used in in-text citations, though their usage varies greatly on which edition of which format you use and would be too lengthy to go into here. However, you would, in MLA, at the end of a sentence based on thoughts that were not your own, place the following information; (Author's last name page number).