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Bailey, Regina. "Lipids." About.com Biology. The New York Times Company, n.d. Web. 20 Sept. 2012. <http://biology.about.com/od/molecularbiology/ss/lipids.htm>.
Miller, Kenneth R., and Joseph S. Levine. "Chapter 2: Section 3." Prentice Hall Biology. Upper Saddle River, NJ: Pearson Prentice Hall, 2006. 44-48. Print.
Bailey, Regina. "Lipids." About.com Biology. The New York Times Company, n.d. Web. 20 Sept. 2012. <http://biology.about.com/od/molecularbiology/ss/lipids.htm>.
Miller, Kenneth R., and Joseph S. Levine. "Chapter 2: Section 3." Prentice Hall Biology. Upper Saddle River, NJ: Pearson Prentice Hall, 2006. 44-48. Print.