Cita APA

Christensen, J. M. (1978). Seashells: Bivalves of the British and northern European seas. Penguin Books.

Chicago Edition Citation

Christensen, J Muller. Seashells: Bivalves of the British and Northern European Seas. New York: Penguin Books, 1978.

Cita MLA

Christensen, J Muller. Seashells: Bivalves of the British and Northern European Seas. Penguin Books, 1978.