Ferree, T., Sanabria, K. 1., Boyd, F., & Numrich, C. (2009). NorthStar 4: Listening and speaking (3 edition.). White Plains, N.Y.: Pearson/Longman.
Citación estilo ChicagoFerree, Tess, Kim 1955- Sanabria, Frances Boyd, y Carol Numrich. NorthStar 4: Listening and Speaking. 3 edition. White Plains, N.Y.: Pearson/Longman, 2009.
Cita MLAFerree, Tess, Kim 1955- Sanabria, Frances Boyd, y Carol Numrich. NorthStar 4: Listening and Speaking. 3 edition. White Plains, N.Y.: Pearson/Longman, 2009.
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