↑ Louis Theodore, R. Ryan Dupont and Kumar Ganesan (Editors) (1999). Pollution Prevention: The Waste Management Approach to the 21st Century. CRC Press. ISBN1-56670-495-2.CS1 maint: Extra text: authors list (link) Section 27, page 15
↑ Kevin R. Reel, R. M. Fikar, P. E. Dumas, Jay M. Templin, and Patricia Van Arnum (2006). AP Chemistry (REA) - The Best Test Prep for the Advanced Placement Exam (9th ed.). Research & Education Association. ISBN0-7386-0221-3.CS1 maint: Multiple names: authors list (link) Section 71, page 224