APA (7th ed.) Citation

Gregory, K. J., & Lewin, J. (2014). Basics of geomorphology: Key concepts. Sage Publications.

Chicago Style (17th ed.) Citation

Gregory, K. J., and John Lewin. Basics of Geomorphology: Key Concepts. Los Angeles: Sage Publications, 2014.

MLA (9th ed.) Citation

Gregory, K. J., and John Lewin. Basics of Geomorphology: Key Concepts. Sage Publications, 2014.

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