APA (7th ed.) Citation

Lönnberg, E. (1927). Some speculations on the origin of the North American ornithic fauna. Almqvist & Wiksell.

Chicago Style (17th ed.) Citation

Lönnberg, Einar. Some Speculations on the Origin of the North American Ornithic Fauna. Stockholm: Almqvist & Wiksell, 1927.

MLA (9th ed.) Citation

Lönnberg, Einar. Some Speculations on the Origin of the North American Ornithic Fauna. Almqvist & Wiksell, 1927.

Warning: These citations may not always be 100% accurate.