APA (7th ed.) Citation

Humlum, J. (1936). Hveradalir in Kerlingarfjöll, Iceland. The Royal Danish Geographical Society.

Chicago Style (17th ed.) Citation

Humlum, Johs. Hveradalir in Kerlingarfjöll, Iceland. The Royal Danish Geographical Society, 1936.

MLA (8th ed.) Citation

Humlum, Johs. Hveradalir in Kerlingarfjöll, Iceland. The Royal Danish Geographical Society, 1936.

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