APA (7th ed.) Zitazioa
Runkel, S. T., & Bull, A. F. (2009). Wildflowers of Iowa woodlands (2nd ed.). University of Iowa Press.
Chicago Style (17th ed.) Zitazioa
Runkel, Sylvan T., eta Alvin F. Bull. Wildflowers of Iowa Woodlands. 2nd ed. Iowa City: University of Iowa Press, 2009.
MLA (9th ed.) Zitazioa
Runkel, Sylvan T., eta Alvin F. Bull. Wildflowers of Iowa Woodlands. 2nd ed. University of Iowa Press, 2009.
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