Cita APA (7a ed.)

Lange, E. C., & La Cortina, R. D. d. (1973). Cortina's German in 20 lessons with illustrations: Intended for self-study and for use in schools (6th ed.). R.D. Cortina.

Cita Chicago Style (17a ed.)

Lange, Eva C., y Rafael Diez de La Cortina. Cortina's German in 20 Lessons with Illustrations: Intended for Self-study and for Use in Schools. 6th ed. New York: R.D. Cortina, 1973.

Cita MLA (9a ed.)

Lange, Eva C., y Rafael Diez de La Cortina. Cortina's German in 20 Lessons with Illustrations: Intended for Self-study and for Use in Schools. 6th ed. R.D. Cortina, 1973.