Παραπομπή σε μορφή APA (7η εκδ.)

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

Παραπομπή σε μορφή Chicago (17η εκδ.)

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

Παραπομπή σε μορφή MLA (9th εκδ.)

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