APA引文

Park , C. F. (1973). Earth resources. Washington, D.C: Voice of American.

Trích dẫn kiểu Chicago

Park , Charles F. Earth Resources. Washington, D.C: Voice of American, 1973.

MLA引文

Park , Charles F. Earth Resources. Washington, D.C: Voice of American, 1973.

警告：這些引文格式不一定是100％准確.