APA (7th ed.) Citation

Rudd, J., Horne, C. F., & Johnson, R. (2006). The Great Events by Famous Historians, Volume 12. Project Gutenberg.

Chicago Style (17th ed.) Citation

Rudd, John, Charles F. Horne, and Rossiter Johnson. The Great Events by Famous Historians, Volume 12. Project Gutenberg, 2006.

MLA (9th ed.) Citation

Rudd, John, et al. The Great Events by Famous Historians, Volume 12. Project Gutenberg, 2006.

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