Bent, R. K., & Kronenberg, H. H. (1941). Principles of secondary education. McGraw-Hill Book Co..
Cita Chicago Style (17a ed.)Bent, Rudyard K., y H. H. Kronenberg. Principles of Secondary Education. New York: McGraw-Hill Book Co., 1941.
Cita MLA (9a ed.)Bent, Rudyard K., y H. H. Kronenberg. Principles of Secondary Education. McGraw-Hill Book Co., 1941.
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