APA-referens (7:e uppl.)

Cummings, B. (1910). The great natural bridges of Utah. University of Utah.

Chicago-referens (17:e uppl.)

Cummings, Byron. The Great Natural Bridges of Utah. [Salt Lake City]: University of Utah, 1910.

MLA-referens (8:e uppl.)

Cummings, Byron. The Great Natural Bridges of Utah. University of Utah, 1910.