Tohutoro APA (7th ed.)

Hartwig, G. (1881). The polar world: A popular description of man and nature in the Arctic and Antarctic regions of the globe (Segunda edición.). Longmans, Green, and Co.

Tohutoru Kātū Chicago (17th ed.)

Hartwig, G. The Polar World: A Popular Description of Man and Nature in the Arctic and Antarctic Regions of the Globe. Segunda edición. London, England, United Kingdom: Longmans, Green, and Co, 1881.

Tohutoro MLA (9th ed.)

Hartwig, G. The Polar World: A Popular Description of Man and Nature in the Arctic and Antarctic Regions of the Globe. Segunda edición. Longmans, Green, and Co, 1881.