Citazione Stile APA (7a Edizione)

Hayes, D. (1972). Challenge of conscience: The story of the conscientious objectors of 1939-1949. Garland Pub..

Citazione stile Chigago Style (17a edizione)

Hayes, Denis. Challenge of Conscience: The Story of the Conscientious Objectors of 1939-1949. New York: Garland Pub., 1972.

Citatione MLA (8a ed.)

Hayes, Denis. Challenge of Conscience: The Story of the Conscientious Objectors of 1939-1949. Garland Pub., 1972.