APA (7th ed.) Citation

Fries, H., & Alcaraz, J. (1971). Un reto a la fe. : Sígueme.

Chicago Style (17th ed.) Citation

Fries, Heinrich, and José Alcaraz. Un Reto a La Fe. Salamanca: : Sígueme, 1971.

MLA (9th ed.) Citation

Fries, Heinrich, and José Alcaraz. Un Reto a La Fe. : Sígueme, 1971.

Warning: These citations may not always be 100% accurate.