APA (7th ed.) Zitazioa
Tryon, R. M. (1980). Ferns of Minnesota (2d ed., rev.). University of Minnesota Press.
Chicago Style (17th ed.) Zitazioa
Tryon, Rolla Milton. Ferns of Minnesota. 2d ed., rev. Minneapolis: University of Minnesota Press, 1980.
MLA (9th ed.) Zitazioa
Tryon, Rolla Milton. Ferns of Minnesota. 2d ed., rev. University of Minnesota Press, 1980.
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