APA-referens (7:e uppl.)

Curtis, W. E. (1892). The United States and foreign powers. Flood and Vincent.

Chicago-referens (17:e uppl.)

Curtis, William Eleroy. The United States and Foreign Powers. Meadville, Pa.: Flood and Vincent, 1892.

MLA-referens (8:e uppl.)

Curtis, William Eleroy. The United States and Foreign Powers. Flood and Vincent, 1892.