Sheeler, W. D. (1971). Elementary course in english 2. Portland, Or.: English Language Services.
Citación estilo ChicagoSheeler, Willard D. Elementary Course in English 2. Portland, Or.: English Language Services, 1971.
Cita MLASheeler, Willard D. Elementary Course in English 2. Portland, Or.: English Language Services, 1971.
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