Cita APA

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 Chicago

Ferree, Tess, Kim 1955- Sanabria, Frances Boyd, y Carol Numrich. NorthStar 4: Listening and Speaking. 3 edition. White Plains, N.Y.: Pearson/Longman, 2009.

Cita MLA

Ferree, Tess, Kim 1955- Sanabria, Frances Boyd, y Carol Numrich. NorthStar 4: Listening and Speaking. 3 edition. White Plains, N.Y.: Pearson/Longman, 2009.