"cross-pollination." A Dictionary of Biology. 2004. Encyclopedia.com. 1 Dec. 2009 <http://www.encyclopedia.com>.
"cross-pollination." A Dictionary of Biology. 2004. Encyclopedia.com. (December 1, 2009). http://www.encyclopedia.com/doc/1O6-crosspollination.html
"cross-pollination." A Dictionary of Biology. 2004. Retrieved December 01, 2009 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O6-crosspollination.html