Cita APA

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

Chicago Style Citation

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

Cita MLA

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