Cita APA (7a ed.)

Velazquez de La Cadena, M., & Gray, E. (1960). Spanish and English Languages. Appleton-Century-Crofts.

Cita Chicago Style (17a ed.)

Velazquez de La Cadena, Mariano, y Edward Gray. Spanish and English Languages. New York: Appleton-Century-Crofts, 1960.

Cita MLA (9a ed.)

Velazquez de La Cadena, Mariano, y Edward Gray. Spanish and English Languages. Appleton-Century-Crofts, 1960.