APA

Smith A. G., . (1971). New record for a rare Galápagos land snail. : .

Chicago

Smith Allyn G, . 1971. New record for a rare Galápagos land snail. : .

Harvard

Smith A. G., . (1971). New record for a rare Galápagos land snail. : .

MLA

Smith Allyn G, . New record for a rare Galápagos land snail. : . 1971.