Hoffman, R. M. (2002). Wisconsin's Natural Communities: How to Recognize Them, Where to Find Them. University of Wisconsin Press.
Style de citation Chicago (17e éd.)Hoffman, Randolph M. Wisconsin's Natural Communities: How to Recognize Them, Where to Find Them. Madison, Wis.: University of Wisconsin Press, 2002.
Style de citation MLA (8e éd.)Hoffman, Randolph M. Wisconsin's Natural Communities: How to Recognize Them, Where to Find Them. University of Wisconsin Press, 2002.
Attention : ces citations peuvent ne pas être correctes à 100%.