Giefer, G. J. (1976). Sources of information in water resources: An annotated guide to printed materials. Water Information Center.
Chicago-Zitierstil (17. Ausg.)Giefer, Gerald J. Sources of Information in Water Resources: An Annotated Guide to Printed Materials. Port Washington, N.Y: Water Information Center, 1976.
MLA-Zitierstil (9. Ausg.)Giefer, Gerald J. Sources of Information in Water Resources: An Annotated Guide to Printed Materials. Water Information Center, 1976.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.