Hatfield, E. J. (1939). An introduction to biology. Clarendon Press.
Chicago Style (17th ed.) CitationHatfield, E. J. An Introduction to Biology. Oxford: Clarendon Press, 1939.
MLA (8th ed.) CitationHatfield, E. J. An Introduction to Biology. Clarendon Press, 1939.
Warning: These citations may not always be 100% accurate.