APA (7th ed.) Citation

Díaz, E., & Wigdorsky, L. (1961). I speak english: Book 2 (2° ed.). Fondo editorial educación moderna.

Chicago Style (17th ed.) Citation

Díaz, Elia, and Leopoldo Wigdorsky. I Speak English: Book 2. 2° ed. Santiago: Fondo editorial educación moderna, 1961.

MLA (9th ed.) Citation

Díaz, Elia, and Leopoldo Wigdorsky. I Speak English: Book 2. 2° ed. Fondo editorial educación moderna, 1961.