Llanas, A., Williams, L., & Ospina, L. J. (1999). Freestyle 3: Student's book. MacMillan.
Chicago-čujuhus (17. p.)Llanas, Angela, Libby Williams, juo Luz Janeth Ospina. Freestyle 3: Student's Book. Oxford: MacMillan, 1999.
MLA-čujuhus (9. p.)Llanas, Angela, et al. Freestyle 3: Student's Book. MacMillan, 1999.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.