APA
Ferree T., Sanabria K., . (2004). NorthStar. listening and speaking, high intermediate. White Plains, NY: Longman.
Chicago
Ferree Tess, Sanabria Kim, . 2004. NorthStar. listening and speaking, high intermediate. White Plains, NY: Longman.
Harvard
Ferree T., Sanabria K., . (2004). NorthStar. listening and speaking, high intermediate. White Plains, NY: Longman.
MLA
Ferree Tess, Sanabria Kim, . NorthStar. listening and speaking, high intermediate. White Plains, NY: Longman. 2004.