APA (7th ed.) Citation

Hart, J. D. (1941). The Oxford companion to American literature. Oxford University Press.

Chicago Style (17th ed.) Citation

Hart, James David. The Oxford Companion to American Literature. London, New York, [etc]: Oxford University Press, 1941.

MLA (9th ed.) Citation

Hart, James David. The Oxford Companion to American Literature. Oxford University Press, 1941.