Citazione Stile APA (7a Edizione)

Perkins, G. B., & Perkins, B. (2002). The American tradition in literature (10th ed.). McGraw-Hill.

Citazione stile Chigago Style (17a edizione)

Perkins, George B., e Barbara Perkins. The American Tradition in Literature. 10th ed. Boston: McGraw-Hill, 2002.

Citatione MLA (8a ed.)

Perkins, George B., e Barbara Perkins. The American Tradition in Literature. 10th ed. McGraw-Hill, 2002.