APA (7th ed.) Citation

Harris M. Michael, Mower D. David, & Sikorzynska A. Anna. (2002). Opportunities. Upper Intermediate: Student's Book. Harlow, Longman, 2002.

Chicago Style (17th ed.) Citation

Harris M. Michael, Mower D. David, and Sikorzynska A. Anna. Opportunities. Upper Intermediate: Student's Book. Harlow, Longman, 2002, 2002.

MLA (9th ed.) Citation

Harris M. Michael, et al. Opportunities. Upper Intermediate: Student's Book. Harlow, Longman, 2002, 2002.