APA (7th ed.) Citation

Hartwig, G. (1874). The polar world: A popular description of man and nature in the Arctic and Antarctic regions of the globe (2. ed.). Longmans, Green.

Chicago Style (17th ed.) Citation

Hartwig, Georg. The Polar World: A Popular Description of Man and Nature in the Arctic and Antarctic Regions of the Globe. 2. ed. London: Longmans, Green, 1874.

MLA (9th ed.) Citation

Hartwig, Georg. The Polar World: A Popular Description of Man and Nature in the Arctic and Antarctic Regions of the Globe. 2. ed. Longmans, Green, 1874.