APA aipamena

Pugh, C. D. J. (1996). Sustainability, the environment and urbanization. Earthscan.

Chicago Style aipamena

Pugh, Cedric D. J. Sustainability, the Environment and Urbanization. London: Earthscan, 1996.

MLA aipamena

Pugh, Cedric D. J. Sustainability, the Environment and Urbanization. Earthscan, 1996.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.