Lewis, C. S., Juan Calabria, S., & Moynihan, M. (1989). Letters C.S. Lewis Don Giovanni Calabria: A study in friendship. Collins.
Chicago Style (17th ed.) CitationLewis, C. S., Santo Juan Calabria, and Martin Moynihan. Letters C.S. Lewis Don Giovanni Calabria: A Study in Friendship. London: Collins, 1989.
MLA (9th ed.) CitationLewis, C. S., et al. Letters C.S. Lewis Don Giovanni Calabria: A Study in Friendship. Collins, 1989.
Warning: These citations may not always be 100% accurate.