FELTWELL, J. (1986). The natural history of butterflies. Facts on file pub.
芝加哥风格引文FELTWELL, John. The Natural History of Butterflies. New York: Facts on file pub, 1986.
MLA引文FELTWELL, John. The Natural History of Butterflies. Facts on file pub, 1986.
警告：这些引文格式不一定是100％准确.