APA (7th ed.) Citation

Johnson, R. B. (1969). Pecos National Monument, New Mexico: Its geologic setting. U.S. G.P.O..

Chicago Style (17th ed.) Citation

Johnson, Ross B. Pecos National Monument, New Mexico: Its Geologic Setting. Washington: U.S. G.P.O., 1969.

MLA (9th ed.) Citation

Johnson, Ross B. Pecos National Monument, New Mexico: Its Geologic Setting. U.S. G.P.O., 1969.