APA
(2015). NORTHSTAR 4TH EDITION GCC READING AND WRITING 4 STUDENT BOOK AND STUDENT'S ENGLISHLAB. [S.l.]: PEARSON EDUCATION LIMITED.
Chicago
2015. NORTHSTAR 4TH EDITION GCC READING AND WRITING 4 STUDENT BOOK AND STUDENT'S ENGLISHLAB. [S.l.]: PEARSON EDUCATION LIMITED.
Harvard
(2015). NORTHSTAR 4TH EDITION GCC READING AND WRITING 4 STUDENT BOOK AND STUDENT'S ENGLISHLAB. [S.l.]: PEARSON EDUCATION LIMITED.
MLA
NORTHSTAR 4TH EDITION GCC READING AND WRITING 4 STUDENT BOOK AND STUDENT'S ENGLISHLAB. [S.l.]: PEARSON EDUCATION LIMITED. 2015.