Ramírez Salas, M. (2004). English Teachers as materials developers. Universidad de Costa Rica.
Čikaški stil citiranja (17. izdanje)Ramírez Salas, Marlene. English Teachers as Materials Developers. Universidad de Costa Rica, 2004.
MLA način citiranja (9. izdanje)Ramírez Salas, Marlene. English Teachers as Materials Developers. Universidad de Costa Rica, 2004.
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