Spears, H. (1949). Some principles of teaching. Prentice-Hall.
Čikaški stil citiranja (17. izdanje)Spears, Harold. Some Principles of Teaching. New York: Prentice-Hall, 1949.
MLA način citiranja (9. izdanje)Spears, Harold. Some Principles of Teaching. Prentice-Hall, 1949.
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