Παραπομπή APA

Alam Singh & Sharma, U. S. (1986). Environmental science and engineering, Current practices Vol 2.

Παραπομπή Chicago Style

Alam Singh και U S. Sharma. Environmental Science and Engineering, Current Practices Vol 2. New Delhi, International Book Traders, 1986.

Παραπομπή MLA

Alam Singh και U S. Sharma. Environmental Science and Engineering, Current Practices Vol 2. 1986.