Ellington, H., & Race, P. (1993). Producing teaching materials: A handbook for teachers and trainers (2nd ed.). Kogan Page.
Chicago Style (17. basım) AtıfEllington, Henry, ve Phil Race. Producing Teaching Materials: A Handbook for Teachers and Trainers. 2nd ed. London: Kogan Page, 1993.
MLA (9th ed.) AtıfEllington, Henry, ve Phil Race. Producing Teaching Materials: A Handbook for Teachers and Trainers. 2nd ed. Kogan Page, 1993.
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