APA (7th ed.) Citation

Gray, E. F. (1972). Leif Eriksson, discoverer of America A.D. 1003. Kraus reprint.

Chicago Style (17th ed.) Citation

Gray, Edward Francis. Leif Eriksson, Discoverer of America A.D. 1003. New York: Kraus reprint, 1972.

MLA (9th ed.) Citation

Gray, Edward Francis. Leif Eriksson, Discoverer of America A.D. 1003. Kraus reprint, 1972.