Παραπομπή σε μορφή APA (7η εκδ.)

Olson, R. K. (1992). Integrating sustainable agriculture, ecology and environmental policy. Food Products Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Olson, Richard K. Integrating Sustainable Agriculture, Ecology and Environmental Policy. New York: Food Products Press, 1992.

Παραπομπή σε μορφή MLA (9th εκδ.)

Olson, Richard K. Integrating Sustainable Agriculture, Ecology and Environmental Policy. Food Products Press, 1992.