APA (7th ed.) Citation

Johnson, R., Horne, C. F., & Rudd, J. (2009). The Great Events by Famous Historians, Volume 13. Project Gutenberg.

Chicago Style (17th ed.) Citation

Johnson, Rossiter, Charles F. Horne, and John Rudd. The Great Events by Famous Historians, Volume 13. Project Gutenberg, 2009.

MLA (9th ed.) Citation

Johnson, Rossiter, et al. The Great Events by Famous Historians, Volume 13. Project Gutenberg, 2009.

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