Dyfyniad APA

Wissler, C. (1941). North American. American Museum of Natural History.

Dyfyniad Arddull Chicago

Wissler, Clark. North American. Nueva York: American Museum of Natural History, 1941.

Dyfyniad MLA

Wissler, Clark. North American. American Museum of Natural History, 1941.

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