APA (7th ed.) Citation

Calleja Medel, G., & Medel Zabala, T. (2010). Correspondencia comercial. [Firmas Press].

Chicago Style (17th ed.) Citation

Calleja Medel, Gilda, and Tirado Medel Zabala. Correspondencia Comercial. [Miami, FL]: [Firmas Press], 2010.

MLA (9th ed.) Citation

Calleja Medel, Gilda, and Tirado Medel Zabala. Correspondencia Comercial. [Firmas Press], 2010.