APA (7th ed.) Citation

Larsen, S. (1925). The discovery of North America: 20 years before Columbus. Levin & Munksgaard.

Chicago Style (17th ed.) Citation

Larsen, Sofus. The Discovery of North America: 20 Years Before Columbus. Copenhagen: Levin & Munksgaard, 1925.

MLA (9th ed.) Citation

Larsen, Sofus. The Discovery of North America: 20 Years Before Columbus. Levin & Munksgaard, 1925.

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