Cita APA

Curtis, J., Lambert, J., & Schmidt, J. (2010). Future english for results 4. New York (EUA): Pearson Education.

Citación estilo Chicago

Curtis, Jane, Jeanne Lambert, y Julie Schmidt. Future English for Results 4. New York (EUA): Pearson Education, 2010.

Cita MLA

Curtis, Jane, Jeanne Lambert, y Julie Schmidt. Future English for Results 4. New York (EUA): Pearson Education, 2010.