Mackin, R., & Mackin, R. (1976). A short course in spoken English ([1. edition].). Portland, Or.: English Language Services.
Citación estilo ChicagoMackin, Ronald, y Ronald Mackin. A Short Course in Spoken English. [1. edition]. Portland, Or.: English Language Services, 1976.
Cita MLAMackin, Ronald, y Ronald Mackin. A Short Course in Spoken English. [1. edition]. Portland, Or.: English Language Services, 1976.
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