Dyfyniad APA

Survey, U. S. G. (1977). Ground-water levels in the United States, 1974: Southeastern states. Washington : United States Government Printing Office.

Dyfyniad Arddull Chicago

Survey, United States. Geological. Ground-water Levels in the United States, 1974: Southeastern States. Washington : United States Government Printing Office, 1977.

Dyfyniad MLA

Survey, United States. Geological. Ground-water Levels in the United States, 1974: Southeastern States. Washington : United States Government Printing Office, 1977.

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