APA引文

Tyagi, O., & Mehra, M. (1990). Textbook of environmental chemistry. Anmol Publications.

Chicago Edition Citation

Tyagi, O.D, and M. Mehra. Textbook of Environmental Chemistry. New Delhi: Anmol Publications, 1990.

MLA引文

Tyagi, O.D, and M. Mehra. Textbook of Environmental Chemistry. Anmol Publications, 1990.