Cita APA (7a ed.)

Tornos, A. d. (1922). The combined spanish method. D. Appleton-Century Company.

Cita Chicago Style (17a ed.)

Tornos, Alberto de. The Combined Spanish Method. New York, Estados Unidos: D. Appleton-Century Company, 1922.

Cita MLA (9a ed.)

Tornos, Alberto de. The Combined Spanish Method. D. Appleton-Century Company, 1922.