APA (7th ed.) Citation

Urbach, E., Gottlieb, P. M., & Surinyach, R. (1950). Alergia. Salvat.

Chicago Style (17th ed.) Citation

Urbach, Erich, Philip M. Gottlieb, and R. Surinyach. Alergia. Barcelona [etc.]: Salvat, 1950.

MLA (9th ed.) Citation

Urbach, Erich, et al. Alergia. Salvat, 1950.