APA (7th ed.) Citation

Weis, J. B., & Ramón Ruiz Amado. (1927). Historia universal.

Chicago Style (17th ed.) Citation

Weis, Juan Bta, and Ramón Ruiz Amado. Historia Universal. Barcelona, 1927.

MLA (9th ed.) Citation

Weis, Juan Bta, and Ramón Ruiz Amado. Historia Universal. 1927.

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