APA (7th ed.) Citation

Twidale, C. R., & Foale, M. R. (1977). Landforms illustrated (New ed.). Nelson.

Chicago Style (17th ed.) Citation

Twidale, Charles R., and M. R. Foale. Landforms Illustrated. New ed. Melbourne: Nelson, 1977.

MLA (9th ed.) Citation

Twidale, Charles R., and M. R. Foale. Landforms Illustrated. New ed. Nelson, 1977.