Parenthetical citation should include the author's last name and the page of the number that is used in providing some information in the text. Since we don't have the page number here in the text, there should be the last name in the parenthetical citation.
If there is used author's name in the Sentence there should be only the number of the page in a parenthetical citation.
This kind of citations are allowing readers to know which sources the writer was using in writing an essay.
