Citazione Stile APA (7a Edizione)

Roper, J. (2009). The illustrated encyclopedia of the presidents of America: An authoritative history of the American presidency, shown in more than 460 photographs and illustrations. Hermes House.

Citazione stile Chigago Style (17a edizione)

Roper, Jon. The Illustrated Encyclopedia of the Presidents of America: An Authoritative History of the American Presidency, Shown in More than 460 Photographs and Illustrations. London: Hermes House, 2009.

Citatione MLA (9a ed.)

Roper, Jon. The Illustrated Encyclopedia of the Presidents of America: An Authoritative History of the American Presidency, Shown in More than 460 Photographs and Illustrations. Hermes House, 2009.