APA (7th ed.) Citation

Koch, J., & Camón Aznar, J. (1930). Historia de Roma. Labor.

Chicago Style (17th ed.) Citation

Koch, Julius, and José Camón Aznar. Historia De Roma. Barcelona [etc.]: Labor, 1930.

MLA (9th ed.) Citation

Koch, Julius, and José Camón Aznar. Historia De Roma. Labor, 1930.

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