Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.