Cita APA (7th ed.)

Harris, M., Mower, D., Sikorzynska, A., & Mrozowska, H. (2002). New opportunities, education for life: Upper intermediate. Student's book (1a. ed.). Pearson Education Limited.

Cita Chicago (17th ed.)

Harris, Michael, David Mower, Anna Sikorzynska, i Hanna Mrozowska. New Opportunities, Education for Life: Upper Intermediate. Student's Book. 1a. ed. Harlow: Pearson Education Limited, 2002.

Cita MLA (9th ed.)

Harris, Michael, et al. New Opportunities, Education for Life: Upper Intermediate. Student's Book. 1a. ed. Pearson Education Limited, 2002.