APA引文

Gangstad, E. O. (1990). Natural resource management of water and land.

Chicago Edition Citation

Gangstad, Edward O. Natural Resource Management of Water and Land. Van Nostrand Reinhold Co., New York, 1990.

MLA引文

Gangstad, Edward O. Natural Resource Management of Water and Land. 1990.

警告：這些引文格式不一定是100％准確.