Books:

• SCIENCE TEXTBOOK FOR CLASS X - Published by National Council of Educational Research and Training 
• Manual of Secondary Science Kit for Classes IX and X -  Published by NCERT

  Websites:

• http://en.wikipedia.org/wiki/Saponification
• http://chemistry.about.com/library/weekly/blsapon.htm
• http://www.metaphysicalfarms.com/archives/18-Saponification-of-Oils-into-Soap.html
• http://www.countryfarm-lifestyles.com/saponification-chart.html
• //www.youtube.com/watch?v=ta9h9S1JoI8