APA引文

London, J., & Van Zyle, J. (2001). Gone again ptarmigan. National Geographic Society.

Chicago Style (17th ed.) Citation

London, Jonathan, and Jon Van Zyle. Gone Again Ptarmigan. Washington, D.C.: National Geographic Society, 2001.

MLA引文

London, Jonathan, and Jon Van Zyle. Gone Again Ptarmigan. National Geographic Society, 2001.

警告：這些引文格式不一定是100％准確.