Cita APA (7th ed.)

Barton, L., Sardinas, C. D., Boyd, F., & Numrich, C. (2009). NorthStar 3: Reading and writing (3rd ed.). Longman.

Cita Chicago (17th ed.)

Barton, Laurie, Carolyn DuPaquier Sardinas, Frances Boyd, i Carol Numrich. NorthStar 3: Reading and Writing. 3rd ed. White Plains, NY: Longman, 2009.

Cita MLA (8th ed.)

Barton, Laurie, et al. NorthStar 3: Reading and Writing. 3rd ed. Longman, 2009.