Gaya APA

Morris, Percy A.. (1951). A Field guide to shells of the atlantic . Boston: Hougton Mifflin.

Gaya Chicago

Morris, Percy A.. A Field guide to shells of the atlantic. Boston: Hougton Mifflin, 1951. .

Gaya MLA

Morris, Percy A.. A Field guide to shells of the atlantic. Boston: Hougton Mifflin, 1951. .

Gaya Turabian

Morris, Percy A.. A Field guide to shells of the atlantic. Boston: Hougton Mifflin, 1951. .