Discovery Channel (Firm). (2004). Ecuador & Galapagos (3rd ed., updated.). Apa Publications.
芝加哥风格引文Discovery Channel (Firm). Ecuador & Galapagos. 3rd ed., updated. Singapore: Apa Publications, 2004.
MLA引文Discovery Channel (Firm). Ecuador & Galapagos. 3rd ed., updated. Apa Publications, 2004.
警告：这些引文格式不一定是100％准确.