Cita APA (7a ed.)

Emerson, W. K. The American Museum of Natural History guide to shells. Land, freshwater, and marine, from Nova Scotia to Florida.

Cita Chicago Style (17a ed.)

Emerson, William K. The American Museum of Natural History Guide to Shells. Land, Freshwater, and Marine, from Nova Scotia to Florida.

Cita MLA (8a ed.)

Emerson, William K. The American Museum of Natural History Guide to Shells. Land, Freshwater, and Marine, from Nova Scotia to Florida.