APA

Pyle P., Howell S. N. G., DeSante D. F. & Yunick R. P. (1997). Identification guide to North American birds. Bolinas, California, United States: Braun-Brumfield Inc.

Chicago

Pyle Peter, Howell Steve N G, DeSante David F and Yunick Robert P. 1997. Identification guide to North American birds. Bolinas, California, United States: Braun-Brumfield Inc.

Harvard

Pyle P., Howell S. N. G., DeSante D. F. and Yunick R. P. (1997). Identification guide to North American birds. Bolinas, California, United States: Braun-Brumfield Inc.

MLA

Pyle Peter, Howell Steve N G, DeSante David F and Yunick Robert P. Identification guide to North American birds. Bolinas, California, United States: Braun-Brumfield Inc. 1997.