Hardin, G. (1968). 39 Steps to Biology. San Francisco: W. H. Freeman.
Chicago Style CitationHardin, Garrett. 39 Steps to Biology. San Francisco: W. H. Freeman, 1968.
MLA CitationHardin, Garrett. 39 Steps to Biology. San Francisco: W. H. Freeman, 1968.
Warning: These citations may not always be 100% accurate.