APA
English L., . (2004). Northstar. reading and writing, high intermediate. Harlow: Longman.
Chicago
English Laura, . 2004. Northstar. reading and writing, high intermediate. Harlow: Longman.
Harvard
English L., . (2004). Northstar. reading and writing, high intermediate. Harlow: Longman.
MLA
English Laura, . Northstar. reading and writing, high intermediate. Harlow: Longman. 2004.