APA (7th ed.) Citation

Harris M. Michael, Mower D. David, & Sikorzynska A. Anna. (2003). Opportunities.Upper Intermediate. Student`s Book (4th ed.). Harlow, Longman, 2003.

Chicago Style (17th ed.) Citation

Harris M. Michael, Mower D. David, and Sikorzynska A. Anna. Opportunities.Upper Intermediate. Student`s Book. 4th ed. Harlow, Longman, 2003, 2003.

MLA (9th ed.) Citation

Harris M. Michael, et al. Opportunities.Upper Intermediate. Student`s Book. 4th ed. Harlow, Longman, 2003, 2003.