Cita APA (7th ed.)

Llanas, A., Williams, L., & Ospina, L. J. (1999). Freestyle 2: Student's book. MacMillan.

Cita Chicago (17th ed.)

Llanas, Angela, Libby Williams, i Luz Janeth Ospina. Freestyle 2: Student's Book. Oxford: MacMillan, 1999.

Cita MLA (9th ed.)

Llanas, Angela, et al. Freestyle 2: Student's Book. MacMillan, 1999.