Zumdahl, Steven S.; Zumdahl, Susan A. (2007). Chemistry (7th ed.). Boston: Houghton Mifflin. ISBN978-0618713707. OCLC85824942.
Nelson, David L.; Cox, Michael M.; Lehninger, Albert L. (2013). Lehninger principles of biochemistry (6th ed.). New York: W.H. Freeman and Company. ISBN9781429234146. OCLC824794893.