Cita APA (7th ed.)

(2003). Interactions 1: Integrated skills. Mc Graw Hill.

Cita Chicago (17th ed.)

Interactions 1: Integrated Skills. New York, Estados Unidos: Mc Graw Hill, 2003.

Cita MLA (9th ed.)

Interactions 1: Integrated Skills. Mc Graw Hill, 2003.