Cita APA (7a ed.)

Runkel, S. T., & Bull, A. F. (2009). Wildflowers of Iowa Woodlands (2nd ed.). University of Iowa Press.

Cita Chicago Style (17a ed.)

Runkel, Sylvan T., y Alvin F. Bull. Wildflowers of Iowa Woodlands. 2nd ed. Iowa City: University of Iowa Press, 2009.

Cita MLA (8a ed.)

Runkel, Sylvan T., y Alvin F. Bull. Wildflowers of Iowa Woodlands. 2nd ed. University of Iowa Press, 2009.