Downie, M. (1995). Freeform: Teacher's book 1. Santillana.
Cita Chicago Style (17a ed.)Downie, Michael. Freeform: Teacher's Book 1. Madrid: Santillana, 1995.
Cita MLA (9a ed.)Downie, Michael. Freeform: Teacher's Book 1. Santillana, 1995.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.