Dyfyniad APA

Burke, E., & Pomeranz, K. (2009). The environment and world history. AUWSF.

Dyfyniad Arddull Chicago

Burke, Edmund, and Kenneth Pomeranz. The Environment and World History. Berkeley: AUWSF, 2009.

Dyfyniad MLA

Burke, Edmund, and Kenneth Pomeranz. The Environment and World History. AUWSF, 2009.

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