Citazione Stile APA (7a Edizione)
Janssen, R. B. (1987). Birds in Minnesota. Published by the University of Minnesota Press for the James Ford Bell Museum of Natural History.
Citazione stile Chigago Style (17a edizione)
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.
Citatione MLA (9a ed.)
Janssen, Robert B. Birds in Minnesota. Published by the University of Minnesota Press for the James Ford Bell Museum of Natural History, 1987.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.