Cita APA

Solórzano, H. S., & Schmidt, J. P. L. (1998). NorthStar: Focus on listening and speaking, intermediate. New York, New York: Longman.

Citación estilo Chicago

Solórzano, Helen Sophia, y Jennifer P. L. Schmidt. NorthStar: Focus On Listening and Speaking, Intermediate. New York, New York: Longman, 1998.

Cita MLA

Solórzano, Helen Sophia, y Jennifer P. L. Schmidt. NorthStar: Focus On Listening and Speaking, Intermediate. New York, New York: Longman, 1998.