APA

Hendrickson J. D., . (1966). The Galápagos tortoises, Geochelone Fitzinger 1835 (Testudo Linnaeus 1758 in part). : .

Chicago

Hendrickson John D, . 1966. The Galápagos tortoises, Geochelone Fitzinger 1835 (Testudo Linnaeus 1758 in part). : .

Harvard

Hendrickson J. D., . (1966). The Galápagos tortoises, Geochelone Fitzinger 1835 (Testudo Linnaeus 1758 in part). : .

MLA

Hendrickson John D, . The Galápagos tortoises, Geochelone Fitzinger 1835 (Testudo Linnaeus 1758 in part). : . 1966.