Carkhuff, R. R. (1976). The skills of teaching: Interpersonal skills. Human Resorces Development..
Lua i Stíl Chicago (17ú heag.)Carkhuff, Robert R. The Skills of Teaching: Interpersonal Skills. Massachuusetts: Human Resorces Development., 1976.
Lua MLA (9ú heag.)Carkhuff, Robert R. The Skills of Teaching: Interpersonal Skills. Human Resorces Development., 1976.
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