APA (7th ed.) Citation

Sigurdur, A. M., & Gudmundur Ingólfsson. (1978). Stallion of the north. Longship Press.

Chicago Style (17th ed.) Citation

Sigurdur, A. Magnusson, and Gudmundur Ingólfsson. Stallion of the North. Nantucket, Mass.: Longship Press, 1978.

MLA (9th ed.) Citation

Sigurdur, A. Magnusson, and Gudmundur Ingólfsson. Stallion of the North. Longship Press, 1978.