Cita APA (7th ed.)

Foley, M., & Hall, D. (2002). Developing Opportunities. Inglés 4º medio: Student's book (1a. ed.). Pearson Education.

Cita Chicago (17th ed.)

Foley, Mark, i Diane Hall. Developing Opportunities. Inglés 4º Medio: Student's Book. 1a. ed. Essex: Pearson Education, 2002.

Cita MLA (9th ed.)

Foley, Mark, i Diane Hall. Developing Opportunities. Inglés 4º Medio: Student's Book. 1a. ed. Pearson Education, 2002.