Dyfyniad APA
Green, J. C., & Janssen, R. B. (1975). Minnesota birds: Where, when, and how many. Published by the University of Minnesota Press, for the James Ford Bell Museum of Natural History.
Dyfyniad Arddull Chicago
Green, Janet C., and Robert B. Janssen. Minnesota Birds: Where, When, and How Many. Minneapolis: Published by the University of Minnesota Press, for the James Ford Bell Museum of Natural History, 1975.
Dyfyniad MLA
Green, Janet C., and Robert B. Janssen. Minnesota Birds: Where, When, and How Many. Published by the University of Minnesota Press, for the James Ford Bell Museum of Natural History, 1975.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.