APA (7th ed.) Citation

Dunphy, J. J., & Dunphy, J. J. (2021). Murder & mayhem in southwestern Illinois (First published 2021.). The History Press.

Chicago Style (17th ed.) Citation

Dunphy, John J., and John J. Dunphy. Murder & Mayhem in Southwestern Illinois. First published 2021. Charleston, SC: The History Press, 2021.

MLA (9th ed.) Citation

Dunphy, John J., and John J. Dunphy. Murder & Mayhem in Southwestern Illinois. First published 2021. The History Press, 2021.