Krug, M. M. (1967). History and the social sciences: New approaches to the teaching of social studies. Blaisdell Pub. Co.
Citace podle Chicago (17th ed.)Krug, Mark M. History and the Social Sciences: New Approaches to the Teaching of Social Studies. Waltham, Mass.: Blaisdell Pub. Co, 1967.
Citace podle MLA (8th ed.)Krug, Mark M. History and the Social Sciences: New Approaches to the Teaching of Social Studies. Blaisdell Pub. Co, 1967.
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