APA引文

Keller, E. A. (1981). Environmental geology. Charles E Merrill.

Chicago Edition Citation

Keller, Edward A. Environmental Geology. Columbus: Charles E Merrill, 1981.

MLA引文

Keller, Edward A. Environmental Geology. Charles E Merrill, 1981.

警告：這些引文格式不一定是100％准確.