APA Citation

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

Trích dẫn kiểu Chicago

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

MLA Citation

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

Advarsel: Disse citationer er muligvist ikke 100% nøjagtige.