Davis, H. A. a. C. (1933). Brief course in plane and sperical trigonometry. American Book.
Čikaški stil citiranja (17. izdanje)Davis, H. A. and Chambers. Brief Course in Plane and Sperical Trigonometry. New ork: American Book, 1933.
MLA način citiranja (9. izdanje)Davis, H. A. and Chambers. Brief Course in Plane and Sperical Trigonometry. American Book, 1933.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.