Παραπομπή APA

Basu, S., & De, A. (2005). Questions and answers in environmental science. Universities press.

Παραπομπή Chicago Style

Basu, S.K, και A.K De. Questions and Answers in Environmental Science. Hyderabad: Universities press, 2005.

Παραπομπή MLA

Basu, S.K, και A.K De. Questions and Answers in Environmental Science. Universities press, 2005.