APA (7th ed.) Citation
Tryon, R. M. (1980). Ferns of Minnesota (2d ed., rev.). University of Minnesota Press.
Chicago Style (17th ed.) Citation
Tryon, Rolla Milton. Ferns of Minnesota. 2d ed., rev. Minneapolis: University of Minnesota Press, 1980.
MLA (9th ed.) Citation
Tryon, Rolla Milton. Ferns of Minnesota. 2d ed., rev. University of Minnesota Press, 1980.
Warning: These citations may not always be 100% accurate.