Cita APA (7a ed.)

Madrigal, M., & Warhol, A. (2001). Madrigal's magic key to Spanish. Broadway Books.

Cita Chicago Style (17a ed.)

Madrigal, Margarita, y Andy Warhol. Madrigal's Magic Key to Spanish. New York, USA: Broadway Books, 2001.

Cita MLA (9a ed.)

Madrigal, Margarita, y Andy Warhol. Madrigal's Magic Key to Spanish. Broadway Books, 2001.