APA (7th ed.) Citation

National Council for Geographic Education (U.S.) & Gabler, R. E. (1966). A Handbook for geography teachers. National Council for Geographic Education.

Chicago Style (17th ed.) Citation

National Council for Geographic Education (U.S.) and Robert E. Gabler. A Handbook for Geography Teachers. Chicago. Ill.: National Council for Geographic Education, 1966.

MLA (8th ed.) Citation

National Council for Geographic Education (U.S.) and Robert E. Gabler. A Handbook for Geography Teachers. National Council for Geographic Education, 1966.