APA (7th ed.) Citation

Gisper, C., & Gay, J. (1990). Historia universal. Ediciones Océano.

Chicago Style (17th ed.) Citation

Gisper, Carlos, and José Gay. Historia Universal. Barcelona: Ediciones Océano, 1990.

MLA (9th ed.) Citation

Gisper, Carlos, and José Gay. Historia Universal. Ediciones Océano, 1990.

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