APA

Preiss، Sherry, . (2009). North Star 5. USA: Pearson Longman.

Chicago

Preiss، Sherry, . 2009. North Star 5. USA: Pearson Longman.

Harvard

Preiss، Sherry, . (2009). North Star 5. USA: Pearson Longman.

MLA

Preiss، Sherry, . North Star 5. USA: Pearson Longman. 2009.