Cita APA (7th ed.)

Foley, M., & Hall, D. (2000). Developing opportunities. Inglés 4§ medio: Studentïs book (1a. ed.). Pearson Education.

Cita Chicago (17th ed.)

Foley, Mark, i Diane Hall. Developing Opportunities. Inglés 4§ Medio: Studentïs Book. 1a. ed. Harlow: Pearson Education, 2000.

Cita MLA (9th ed.)

Foley, Mark, i Diane Hall. Developing Opportunities. Inglés 4§ Medio: Studentïs Book. 1a. ed. Pearson Education, 2000.