Cita APA

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

Chicago Style Citation

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

Cita MLA

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