APA

Baur G., . (1889). The gigantic land tortoises of the Galapagos Islands. : .

Chicago

Baur G, . 1889. The gigantic land tortoises of the Galapagos Islands. : .

Harvard

Baur G., . (1889). The gigantic land tortoises of the Galapagos Islands. : .

MLA

Baur G, . The gigantic land tortoises of the Galapagos Islands. : . 1889.