Cita APA (7th ed.)

Downie, M. (1995). Freeform: Teacher's book 1. Santillana.

Cita Chicago (17th ed.)

Downie, Michael. Freeform: Teacher's Book 1. Madrid: Santillana, 1995.

Cita MLA (9th ed.)

Downie, Michael. Freeform: Teacher's Book 1. Santillana, 1995.