APA استشهاد

Wright, R. T., & Nobel , B. J. (2007). Environmental Science (9th ed.). Prentice Hall of India.

استشهاد بنمط شيكاغو

Wright, Richard T., و Bernard J. Nobel. Environmental Science. 9th ed. New Delhi: Prentice Hall of India, 2007.

MLA استشهاد

Wright, Richard T., و Bernard J. Nobel. Environmental Science. 9th ed. Prentice Hall of India, 2007.