Cita APA (7a ed.)

Gray, J. E. (1866). Catalogue of Seals and Whales in the British Museum (2nd.ed.). British Museum.

Cita Chicago Style (17a ed.)

Gray, John Edward. Catalogue of Seals and Whales in the British Museum. 2nd.ed. London: British Museum, 1866.

Cita MLA (9a ed.)

Gray, John Edward. Catalogue of Seals and Whales in the British Museum. 2nd.ed. British Museum, 1866.