Moyle, J. B., & Moyle, E. W. (2001). Northland wildflowers: The comprehensive guide to the Minnesota region (Rev. ed.). University of Minnesota Press.
Lua i Stíl Chicago (17ú heag.)Moyle, John B., agus Evelyn W. Moyle. Northland Wildflowers: The Comprehensive Guide to the Minnesota Region. Rev. ed. Minneapolis: University of Minnesota Press, 2001.
Lua MLA (9ú heag.)Moyle, John B., agus Evelyn W. Moyle. Northland Wildflowers: The Comprehensive Guide to the Minnesota Region. Rev. ed. University of Minnesota Press, 2001.
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