Παραπομπή σε μορφή APA (7η εκδ.)

Robertson, T. (2012). The Malthusian moment: Global population growth and the birth of American environmentalism. Rutgers University Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Robertson, Thomas. The Malthusian Moment: Global Population Growth and the Birth of American Environmentalism. New Brunswick: Rutgers University Press, 2012.

Παραπομπή σε μορφή MLA (9th εκδ.)

Robertson, Thomas. The Malthusian Moment: Global Population Growth and the Birth of American Environmentalism. Rutgers University Press, 2012.