APA引文

Enger Eldon D, & Smith Bradley F. (2009). Environmental Science. NewYork: Mc Graw-Hill.

Trích dẫn kiểu Chicago

Enger Eldon D, và Smith Bradley F. Environmental Science. NewYork: Mc Graw-Hill, 2009.

MLA引文

Enger Eldon D, và Smith Bradley F. Environmental Science. NewYork: Mc Graw-Hill, 2009.

警告：這些引文格式不一定是100％准確.