Franklin

MLA

Duncan, Peter Martin. Cassell's Natural History. London: Cassell, Petter, Galpin & Co., 1883.

APA

Duncan, P. Martin. (1883). Cassell's natural history. London: Cassell, Petter, Galpin & Co.

Chicago

Duncan, Peter Martin, Cassell's Natural History. London: Cassell, Petter, Galpin & Co., 1883.