Cita APA (7a ed.)

Mohlenbrock, R. H., & Voigt, J. W. (1974). A flora of southern Illinois. Southern Illinois University Press.

Cita Chicago Style (17a ed.)

Mohlenbrock, Robert H., y John W. Voigt. A Flora of Southern Illinois. Carbondale: Southern Illinois University Press, 1974.

Cita MLA (8a ed.)

Mohlenbrock, Robert H., y John W. Voigt. A Flora of Southern Illinois. Southern Illinois University Press, 1974.