APA-referens (7:e uppl.)

Frazier, L. M. (1998). North Star: Focus on listening and speaking (Basic). Pearson Education.

Chicago-referens (17:e uppl.)

Frazier, Laurie; Mills. North Star: Focus on Listening and Speaking (Basic). New York, Estados Unidos: Pearson Education, 1998.

MLA-referens (9:e uppl.)

Frazier, Laurie; Mills. North Star: Focus on Listening and Speaking (Basic). Pearson Education, 1998.