APA (7th ed.) Citation

Irwin, C. H. (1980). Strange footprints on the land: Vikings in America. Harper and Row.

Chicago Style (17th ed.) Citation

Irwin, Constance H. Strange Footprints on the Land: Vikings in America. New York: Harper and Row, 1980.

MLA (9th ed.) Citation

Irwin, Constance H. Strange Footprints on the Land: Vikings in America. Harper and Row, 1980.