APA

Harlan R., . (1835). Description of the Testudo elephantopus from the Galapagos Islands. : .

Chicago

Harlan R, . 1835. Description of the Testudo elephantopus from the Galapagos Islands. : .

Harvard

Harlan R., . (1835). Description of the Testudo elephantopus from the Galapagos Islands. : .

MLA

Harlan R, . Description of the Testudo elephantopus from the Galapagos Islands. : . 1835.