Citazione Stile APA (7a Edizione)

Peterson, R. (1997). Pigskin: The early years of pro football. Oxford University Press.

Citazione stile Chigago Style (17a edizione)

Peterson, Robert. Pigskin: The Early Years of Pro Football. New York: Oxford University Press, 1997.

Citatione MLA (9a ed.)

Peterson, Robert. Pigskin: The Early Years of Pro Football. Oxford University Press, 1997.