Cita APA

Christensen, J. M. (1980). Seashells: Bivalves of the British and northern European seas. Penguin.

Citación estilo Chicago

Christensen, J. Moller. Seashells: Bivalves of the British and Northern European Seas. England: Penguin, 1980.

Cita MLA

Christensen, J. Moller. Seashells: Bivalves of the British and Northern European Seas. Penguin, 1980.