Dyfyniad APA
Schwartz, F. W., & Zhang, H. (2003). Fundamentals of ground water. Wiley.
Dyfyniad Arddull Chicago
Schwartz, F. W., and Hubao Zhang. Fundamentals of Ground Water. New York: Wiley, 2003.
Dyfyniad MLA
Schwartz, F. W., and Hubao Zhang. Fundamentals of Ground Water. Wiley, 2003.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.