Harmer, J., & Elsworth, S. (1987). Meridian. 3, Activity book (2nd ed.). Longman.
Chicago Style (17th ed.) CitationHarmer, Jeremy, and Steve Elsworth. Meridian. 3, Activity Book. 2nd ed. Harlow: Longman, 1987.
MLA (9th ed.) CitationHarmer, Jeremy, and Steve Elsworth. Meridian. 3, Activity Book. 2nd ed. Longman, 1987.