APA

Lewis C. S., . (1958). The allegory of love: a study in medieval tradition. New York: Oxford University Press.

Chicago

Lewis C S, . 1958. The allegory of love: a study in medieval tradition. New York: Oxford University Press.

Harvard

Lewis C. S., . (1958). The allegory of love: a study in medieval tradition. New York: Oxford University Press.

MLA

Lewis C S, . The allegory of love: a study in medieval tradition. New York: Oxford University Press. 1958.