Lembo, J. M. (1969). The psychology of effective classroom instruction. C. E. Merrill.
Lua i Stíl Chicago (17ú heag.)Lembo, John M. The Psychology of Effective Classroom Instruction. Columbus, Ohio: C. E. Merrill, 1969.
Lua MLA (9ú heag.)Lembo, John M. The Psychology of Effective Classroom Instruction. C. E. Merrill, 1969.
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