Cita APA (7th ed.)

Gregory, K. (1979). environmental processes; a: Physical geography perspective. Dawson.

Cita Chicago (17th ed.)

Gregory, K.J. Environmental Processes; a: Physical Geography Perspective. Kent: Dawson, 1979.

Cita MLA (9th ed.)

Gregory, K.J. Environmental Processes; a: Physical Geography Perspective. Dawson, 1979.