APA (7th ed.) Citation

Lewis, A. R. (1978). The sea and medieval civilizations. Variorum Reprints.

Chicago Style (17th ed.) Citation

Lewis, Archibald Ross. The Sea and Medieval Civilizations. London: Variorum Reprints, 1978.

MLA (9th ed.) Citation

Lewis, Archibald Ross. The Sea and Medieval Civilizations. Variorum Reprints, 1978.