Παραπομπή σε μορφή APA (7η εκδ.)

Clay, J. W. (2004). World agriculture and the environment: A commodity - by - commodity guide to impacts and practices. Island Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Clay, Jason W. World Agriculture and the Environment: A Commodity - by - Commodity Guide to Impacts and Practices. Washington: Island Press, 2004.

Παραπομπή σε μορφή MLA (9th εκδ.)

Clay, Jason W. World Agriculture and the Environment: A Commodity - by - Commodity Guide to Impacts and Practices. Island Press, 2004.