Gerlach, V. S. (1971). Teaching and media: A systematic approach. Prentice-Hall.
Chicago Style (17th ed.) ZitazioaGerlach, Vernon S. Teaching and Media: A Systematic Approach. Englewood Cliffs: Prentice-Hall, 1971.
MLA (9th ed.) ZitazioaGerlach, Vernon S. Teaching and Media: A Systematic Approach. Prentice-Hall, 1971.
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