APA-referens (7:e uppl.)

Brooks, W. P. (1905). Agriculture .. (3rd ed.). The Home Correspondence School.

Chicago-referens (17:e uppl.)

Brooks, William P. Agriculture .. 3rd ed. Springfield, Mass.: The Home Correspondence School, 1905.

MLA-referens (8:e uppl.)

Brooks, William P. Agriculture .. 3rd ed. The Home Correspondence School, 1905.