APA (7th ed.) Citation

Knapp, B. (1979). Elements of geographical hydrology. Unwin Hyman.

Chicago Style (17th ed.) Citation

Knapp, Brian. Elements of Geographical Hydrology. Boston: Unwin Hyman, 1979.

MLA (9th ed.) Citation

Knapp, Brian. Elements of Geographical Hydrology. Unwin Hyman, 1979.