APA (7th ed.) Citation

Silverberg, R., & González Trejo, M. (1981). Regreso a Belzagor. Martínez Roca.

Chicago Style (17th ed.) Citation

Silverberg, Robert, and Margarita González Trejo. Regreso a Belzagor. Barcelona: Martínez Roca, 1981.

MLA (9th ed.) Citation

Silverberg, Robert, and Margarita González Trejo. Regreso a Belzagor. Martínez Roca, 1981.

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