APA Style

Cunningham, W, P., Cunningham, M, A. (2007). Principles of Environmental Science: Inquiry and Applications (4th Edition). New Delhi: Tata McGraw Hill.

MLA Style

Cunningham, William, P.., Cunningham, Mary, Ann. "Principles of Environmental Science: Inquiry and Applications". 4th Edition New Delhi: Tata McGraw Hill, 2007. Text.