APA (7 ম সংস্করণ) উদ্ধৃতি

Black, G. (1992). Iowa birdlife. Published for the Nature Conservancy by the University of Iowa Press.

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

Black, Gladys. Iowa Birdlife. Iowa City: Published for the Nature Conservancy by the University of Iowa Press, 1992.

M.L.A (9 ম সংস্করণ) উদ্ধৃতি

Black, Gladys. Iowa Birdlife. Published for the Nature Conservancy by the University of Iowa Press, 1992.