APA (7th ed.) Citation

Carroll, W. H. (1991). Isabel of Spain: The Catholic Queen. Christendom Press.

Chicago Style (17th ed.) Citation

Carroll, Warren Hasty. Isabel of Spain: The Catholic Queen. Front Royal, Virginia: Christendom Press, 1991.

MLA (9th ed.) Citation

Carroll, Warren Hasty. Isabel of Spain: The Catholic Queen. Christendom Press, 1991.