APA Citation

Educational Challenges, I. (1983). World geography. Lexington, Mass: D.C. Heath and Co..

Chicago Style Citation

Educational Challenges, Inc. World Geography. Lexington, Mass: D.C. Heath and Co., 1983.

MLA Citation

Educational Challenges, Inc. World Geography. Lexington, Mass: D.C. Heath and Co., 1983.

Warning: These citations may not always be 100% accurate.