APA (7th ed.) Citation

Gerrard, A. J. (1988). Rocks and landforms. Unwin Heyman.

Chicago Style (17th ed.) Citation

Gerrard, A. J. Rocks and Landforms. London <<[u.a.]>>: Unwin Heyman, 1988.

MLA (9th ed.) Citation

Gerrard, A. J. Rocks and Landforms. Unwin Heyman, 1988.