Citazione Stile APA (7a Edizione)

Corwin, E. S., & Koenig, L. W. (1956). The presidency today. New York University Press.

Citazione stile Chigago Style (17a edizione)

Corwin, Edwarsd Samuel, e Louis W. Koenig. The Presidency Today. New York: New York University Press, 1956.

Citatione MLA (9a ed.)

Corwin, Edwarsd Samuel, e Louis W. Koenig. The Presidency Today. New York University Press, 1956.