توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

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.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

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.

توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)

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.