Gaya APA

Iqbal, S, A., Iqbal, N. (2011). Textbook of Environmental Chemistry . New Delhi: Tilak Wasan.

Gaya MLA

Iqbal, Syed, Aftab., Iqbal, Neelofar. "Textbook of Environmental Chemistry". New Delhi: Tilak Wasan, 2011. Text.