APA-referens (7:e uppl.)

(1948). Warp's review workbooks. Warp Publishing Company.

Chicago-referens (17:e uppl.)

Warp's Review Workbooks. Minden, Nebraska: Warp Publishing Company, 1948.

MLA-referens (8:e uppl.)

Warp's Review Workbooks. Warp Publishing Company, 1948.