APA (7th ed.) Citation

Mohlenbrock, R. H., & Voigt, J. W. (1959). A flora of southern Illinois. Southern Illinois University Press.

Chicago Style (17th ed.) Citation

Mohlenbrock, Robert H., and John W. Voigt. A Flora of Southern Illinois. Carbondale: Southern Illinois University Press, 1959.

MLA (9th ed.) Citation

Mohlenbrock, Robert H., and John W. Voigt. A Flora of Southern Illinois. Southern Illinois University Press, 1959.

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