APA

Frazier L., Mills R., . (2009). North Star 2. NewYork: Pearson education.

Chicago

Frazier Laurie, Mills Robin, . 2009. North Star 2. NewYork: Pearson education.

Harvard

Frazier L., Mills R., . (2009). North Star 2. NewYork: Pearson education.

MLA

Frazier Laurie, Mills Robin, . North Star 2. NewYork: Pearson education. 2009.