APA

Collin P., . (1996). Dictionary of ecology & the environment. New Delhi: Universal book Stall.

Chicago

Collin P.H, . 1996. Dictionary of ecology & the environment. New Delhi: Universal book Stall.

Harvard

Collin P., . (1996). Dictionary of ecology & the environment. New Delhi: Universal book Stall.

MLA

Collin P.H, . Dictionary of ecology & the environment. New Delhi: Universal book Stall. 1996.