Free, J. (1976). Insect pollination of crops. Acadamic Press.
Chicago Edition CitationFree, J.B. Insect Pollination of Crops. London: Acadamic Press, 1976.
MLA Edition CitationFree, J.B. Insect Pollination of Crops. Acadamic Press, 1976.
Warning: These citations may not always be 100% accurate.