Janssen, R. B. (1987). Birds in Minnesota. Published by the University of Minnesota Press for the James Ford Bell Museum of Natural History.
Chicago-Zitierstil (17. Ausg.)Janssen, Robert B. Birds in Minnesota. Minneapolis, MN: Published by the University of Minnesota Press for the James Ford Bell Museum of Natural History, 1987.
MLA-Zitierstil (9. Ausg.)Janssen, Robert B. Birds in Minnesota. Published by the University of Minnesota Press for the James Ford Bell Museum of Natural History, 1987.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.