Não informado. (2003). North American Birds. American Birding Association.
Chicagoスタイル(17版)引用形式Não informado. North American Birds. Colorado Springs, Colo: American Birding Association, 2003.
MLA(8版)引用形式Não informado. North American Birds. American Birding Association, 2003.
警告: この引用は必ずしも正確ではありません.