APA (7 ম সংস্করণ) উদ্ধৃতি

Cottrell, A. (1978). Environmental economics: An introduction for students of the resource and environmental sciences. Edward Arnold.

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

Cottrell, Alan. Environmental Economics: An Introduction for Students of the Resource and Environmental Sciences. Edward Arnold, 1978.

M.L.A (9 ম সংস্করণ) উদ্ধৃতি

Cottrell, Alan. Environmental Economics: An Introduction for Students of the Resource and Environmental Sciences. Edward Arnold, 1978.