Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

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