APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (8th ed.) Citation

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

Warning: These citations may not always be 100% accurate.