Cita APA (7a ed.)

Harris, M., & Mower, D. S. (2006). New opportunities: Elementary : teacher's book (2nd ed.).

Cita Chicago Style (17a ed.)

Harris, Michael, y David Sikorzynska Mower. New Opportunities: Elementary : Teacher's Book. 2nd ed. Harlow, 2006.

Cita MLA (9a ed.)

Harris, Michael, y David Sikorzynska Mower. New Opportunities: Elementary : Teacher's Book. 2nd ed. 2006.