Citazione Stile APA (7a Edizione)

Verma, P. S., & Agarwal, V. K. (2000). Environmental biology (Principles of ecology). S. Chand & Company.

Citazione stile Chigago Style (17a edizione)

Verma, P. S., e V. K. Agarwal. Environmental Biology (Principles of Ecology). New Delhi: S. Chand & Company, 2000.

Citatione MLA (9a ed.)

Verma, P. S., e V. K. Agarwal. Environmental Biology (Principles of Ecology). S. Chand & Company, 2000.