APA (7th ed.) Citation

Black, R. F. (1964). Gubik Formation of Quaternary age in northern Alaska. U.S. G.P.O..

Chicago Style (17th ed.) Citation

Black, Robert F. Gubik Formation of Quaternary Age in Northern Alaska. Washington, D.C.: U.S. G.P.O., 1964.

MLA (9th ed.) Citation

Black, Robert F. Gubik Formation of Quaternary Age in Northern Alaska. U.S. G.P.O., 1964.