APA-referens (7:e uppl.)

Duggar, J. F. (1908). Agriculture for southern schools. The Macmillan Company.

Chicago-referens (17:e uppl.)

Duggar, J. F. Agriculture for Southern Schools. New York: The Macmillan Company, 1908.

MLA-referens (8:e uppl.)

Duggar, J. F. Agriculture for Southern Schools. The Macmillan Company, 1908.