Dyfyniad APA

Discovery Channel (Firm). (2004). Ecuador & Galapagos (3rd ed., updated.). Apa Publications.

Dyfyniad Arddull Chicago

Discovery Channel (Firm). Ecuador & Galapagos. 3rd ed., updated. Singapore: Apa Publications, 2004.

Dyfyniad MLA

Discovery Channel (Firm). Ecuador & Galapagos. 3rd ed., updated. Apa Publications, 2004.

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