Cita APA (7th ed.)

Gregory, K. J., & Walling, D. E. (1981). Man and environmental processes: A physical geography perspective. Butterworths.

Cita Chicago (17th ed.)

Gregory, K. J., i D. E. Walling. Man and Environmental Processes: A Physical Geography Perspective. London: Butterworths, 1981.

Cita MLA (9th ed.)

Gregory, K. J., i D. E. Walling. Man and Environmental Processes: A Physical Geography Perspective. Butterworths, 1981.