Cita APA (7a ed.)

Madrigal, M., & Madrigal, E. An invitation to spanish.

Cita Chicago Style (17a ed.)

Madrigal, Margarita, y Ezequías Madrigal. An Invitation to Spanish. New York.

Cita MLA (8a ed.)

Madrigal, Margarita, y Ezequías Madrigal. An Invitation to Spanish.