Dyfyniad APA

Ward, R. C., & Robinson, M. (2000). Principles of hydrology (Ed.4.). McGraw-Hill.

Dyfyniad Arddull Chicago

Ward, R C., and M. Robinson. Principles of Hydrology. Ed.4. London: McGraw-Hill, 2000.

Dyfyniad MLA

Ward, R C., and M. Robinson. Principles of Hydrology. Ed.4. McGraw-Hill, 2000.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.