APA (7th ed.) Citation

Lütken, C. F., & Lundbeck, T. (1898). The Danish Ingolf-expedition. Hagerup.

Chicago Style (17th ed.) Citation

Lütken, Christian Frederik, and Torben Lundbeck. The Danish Ingolf-expedition. Copenhagen: Hagerup, 1898.

MLA (9th ed.) Citation

Lütken, Christian Frederik, and Torben Lundbeck. The Danish Ingolf-expedition. Hagerup, 1898.