APA Citation

 Solo''rzano, H. S. (2015).  Northstar 3: Listening & Speaking.  Pearson Education.

Trích dẫn kiểu Chicago

 Solo''rzano, Helen S.  Northstar 3: Listening & Speaking.  Pearson Education, 2015.

MLA Citation

 Solo''rzano, Helen S.  Northstar 3: Listening & Speaking.  Pearson Education, 2015.

Advarsel: Disse citationer er muligvist ikke 100% nøjagtige.