Παραπομπή σε μορφή APA (7η εκδ.)

Williams, M. (1996). Understanding geographical and environmental education: The role of research. Cassell.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Williams, Michael. Understanding Geographical and Environmental Education: The Role of Research. London: Cassell, 1996.

Παραπομπή σε μορφή MLA (9th εκδ.)

Williams, Michael. Understanding Geographical and Environmental Education: The Role of Research. Cassell, 1996.