Cita APA

Llanas, A., Williams, L., & Ospina, L. J. (1999). Freestyle 5: Student's book. MacMillan.

Citación estilo Chicago

Llanas, Angela, Libby Williams, and Luz Janeth Ospina. Freestyle 5: Student's Book. Oxford: MacMillan, 1999.

Cita MLA

Llanas, Angela, et al. Freestyle 5: Student's Book. MacMillan, 1999.