Cita APA

 Merdinger, P. (2009).  Northstar 1: Listening and Speaking.  Pearson Education.

Citación estilo Chicago

 Merdinger, Polly.  Northstar 1: Listening and Speaking.  Pearson Education, 2009.

Cita MLA

 Merdinger, Polly.  Northstar 1: Listening and Speaking.  Pearson Education, 2009.

Precaución: Estas citas no son 100% exactas.