APA引文

Howell, S. N. G. (2003). Hummingbirds of North America: The photographic guide. Princeton University Press.

Chicago Style (17th ed.) Citation

Howell, Steve N. G. Hummingbirds of North America: The Photographic Guide. Princeton: Princeton University Press, 2003.

MLA引文

Howell, Steve N. G. Hummingbirds of North America: The Photographic Guide. Princeton University Press, 2003.

警告：這些引文格式不一定是100％准確.