Citazione Stile APA (7a Edizione)

Ketchum, R. M. (1973). Will Rogers, his life and times. American Heritage Pub. Co.; distribution by McGraw-Hill.

Citazione stile Chigago Style (17a edizione)

Ketchum, Richard M. Will Rogers, His Life and Times. New York: American Heritage Pub. Co.; distribution by McGraw-Hill, 1973.

Citatione MLA (8a ed.)

Ketchum, Richard M. Will Rogers, His Life and Times. American Heritage Pub. Co.; distribution by McGraw-Hill, 1973.