APA

Cornell Laboratory of Ornithology, . (1997). Cerulean warbler atlas project (CEWAP). New York: Cornell Laboratory of Ornithology.

Chicago

Cornell Laboratory of Ornithology, . 1997. Cerulean warbler atlas project (CEWAP). New York: Cornell Laboratory of Ornithology.

Harvard

Cornell Laboratory of Ornithology, . (1997). Cerulean warbler atlas project (CEWAP). New York: Cornell Laboratory of Ornithology.

MLA

Cornell Laboratory of Ornithology, . Cerulean warbler atlas project (CEWAP). New York: Cornell Laboratory of Ornithology. 1997.