APA (7th ed.) Citation

Welty, E., Pérez, J. M. ., & Ventosa, J. A. (1956). Catecismo social. Herder.

Chicago Style (17th ed.) Citation

Welty, Eberhard, Juan Manuel Pérez, and Juan A. Ventosa. Catecismo Social. Barcelona: Herder, 1956.

MLA (9th ed.) Citation

Welty, Eberhard, et al. Catecismo Social. Herder, 1956.