National Council of Geography Teachers (U.S.) & National Council for Geographic Education. Professional paper. National Council of Geography Teachers.
Chicago Style (17th ed.) CitationNational Council of Geography Teachers (U.S.) and National Council for Geographic Education. Professional Paper. [Place of publication not identified]: National Council of Geography Teachers.
MLA (9th ed.) CitationNational Council of Geography Teachers (U.S.) and National Council for Geographic Education. Professional Paper. National Council of Geography Teachers.
Warning: These citations may not always be 100% accurate.