Fry, C. (1970). The dark is light enough: A winter comedy. Oxford University Press.
Chicago Style (17th ed.) CitationFry, Christopher. The Dark Is Light Enough: A Winter Comedy. London [etc.]: Oxford University Press, 1970.
MLA (9th ed.) CitationFry, Christopher. The Dark Is Light Enough: A Winter Comedy. Oxford University Press, 1970.
Warning: These citations may not always be 100% accurate.