Ramírez Salas, M. (2004). English Teachers as materials developers. Universidad de Costa Rica.
Chicago Style (17. basım) AtıfRamírez Salas, Marlene. English Teachers as Materials Developers. Universidad de Costa Rica, 2004.
MLA (9th ed.) AtıfRamírez Salas, Marlene. English Teachers as Materials Developers. Universidad de Costa Rica, 2004.
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