APA (7e ed.) Bronvermelding
Black, G. (1992). Iowa birdlife. Published for the Nature Conservancy by the University of Iowa Press.
Chicago (17e ed.) Bronvermelding
Black, Gladys. Iowa Birdlife. Iowa City: Published for the Nature Conservancy by the University of Iowa Press, 1992.
MLA (9e ed.) Bronvermelding
Black, Gladys. Iowa Birdlife. Published for the Nature Conservancy by the University of Iowa Press, 1992.
Let op: Deze citaties zijn niet altijd 100% accuraat.