APA (7th ed.) Citation

Collins, R. (1983). Early medieval Spain: Unity in diversity, 400-1000. St. Martin's Press.

Chicago Style (17th ed.) Citation

Collins, Roger. Early Medieval Spain: Unity in Diversity, 400-1000. New York: St. Martin's Press, 1983.

MLA (9th ed.) Citation

Collins, Roger. Early Medieval Spain: Unity in Diversity, 400-1000. St. Martin's Press, 1983.