APA引文

Perkins, B., & Perkins, G. B. (1999). The American tradition in literature (9th ed.). Boston, Mass: McGraw-Hill.

Trích dẫn kiểu Chicago

Perkins, Barbara, và George B. Perkins. The American Tradition in Literature. 9th ed. Boston, Mass: McGraw-Hill, 1999.

MLA引文

Perkins, Barbara, và George B. Perkins. The American Tradition in Literature. 9th ed. Boston, Mass: McGraw-Hill, 1999.

警告：这些引文格式不一定是100％准确.