Cita APA (7a ed.)

Gray, D. M. (1970). Handbook on the principles of hydrology. Water Information Center, Inc..

Cita Chicago Style (17a ed.)

Gray, Donald M. Handbook on the Principles of Hydrology. Iowa: Water Information Center, Inc., 1970.

Cita MLA (9a ed.)

Gray, Donald M. Handbook on the Principles of Hydrology. Water Information Center, Inc., 1970.