APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

Solórzano, helen S., en Jennifer P. L. Schmidt. NorthStar: Focus on Listening and Speaking, Intermediate. Nueva York: Longman, 1998.

MLA (9e ed.) Bronvermelding

Solórzano, helen S., en Jennifer P. L. Schmidt. NorthStar: Focus on Listening and Speaking, Intermediate. Longman, 1998.