APA (7th ed.) Citation

(1977). Ground-water levels in the United States, 1971-74: Northwestern states. U.S. G.P.O..

Chicago Style (17th ed.) Citation

Ground-water Levels in the United States, 1971-74: Northwestern States. Washington, D.C.: U.S. G.P.O., 1977.

MLA (9th ed.) Citation

Ground-water Levels in the United States, 1971-74: Northwestern States. U.S. G.P.O., 1977.