It is recommended that when you use an author’s name for the first time in your work, include their complete name as written in the text you are referring to. After this, you may refer to them by only their surname.
When it comes to parenthetical citations, however, the rules are always the same: include their surname and the series of page numbers.
Format
(Surname XX-XX)
Example
(Cubbons 34-56)
If you are including the author’s name in the sentence itself, you do not have to write the surname again within parentheses. In such circumstances, you may just include just the page numbers within parentheses at the end of the sentence. However, remember to use the author’s complete name if this is your first reference to this author in your work.
Example
Maria Garcia explains this unique phenomenon (45-67).