Cita APA (7a ed.)

Madrigal, M. (1960). Madrigal's key to spanish. Doubleday.

Cita Chicago Style (17a ed.)

Madrigal, Margarita. Madrigal's Key to Spanish. New York: Doubleday, 1960.

Cita MLA (9a ed.)

Madrigal, Margarita. Madrigal's Key to Spanish. Doubleday, 1960.