Cita APA

Kennedy, M., & Kopp, S. (2000). Understanding map projections. New York, New York: Environmental Systems Research Institute.

Citación estilo Chicago

Kennedy, Melita, y Steve Kopp. Understanding Map Projections. New York, New York: Environmental Systems Research Institute, 2000.

Cita MLA

Kennedy, Melita, y Steve Kopp. Understanding Map Projections. New York, New York: Environmental Systems Research Institute, 2000.