Gaya APA

Morris, P, A. (1973). A Field Guide to Shells of the Atlantic and Gulf Coasts and the West Indies (Ed. 3). America: Hougton Mifflin Company Boston.

Gaya MLA

Morris, Percy, A. "A Field Guide to Shells of the Atlantic and Gulf Coasts and the West Indies". Ed. 3 America: Hougton Mifflin Company Boston, 1973. Text.