APA-referens (7:e uppl.)

Euler, R. C. (1961). Havasupai historical data. Marks and Marks.

Chicago-referens (17:e uppl.)

Euler, Robert C. Havasupai Historical Data. Phoenix, Ariz.: Marks and Marks, 1961.

MLA-referens (8:e uppl.)

Euler, Robert C. Havasupai Historical Data. Marks and Marks, 1961.