Heward, W. L. (1984). Focus on behavior analysis in education. Charles E. Merrill Publishing Company.
Citace podle Chicago (17th ed.)Heward, William L. Focus on Behavior Analysis in Education. Columbus, Ohio: Charles E. Merrill Publishing Company, 1984.
Citace podle MLA (9th ed.)Heward, William L. Focus on Behavior Analysis in Education. Charles E. Merrill Publishing Company, 1984.
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