APA-ийн эшлэл(7 дахь хэвлэлт)

Gardner, D., & Overcott, N. (2006). Fifty common birds of the upper Midwest. University of Iowa Press.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Gardner, Dana, ба Nancy Overcott. Fifty Common Birds of the Upper Midwest. Iowa City: University of Iowa Press, 2006.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Gardner, Dana, ба Nancy Overcott. Fifty Common Birds of the Upper Midwest. University of Iowa Press, 2006.