Books:

• Science text book for class IX – Published by National Council of Educational Research and Training, New Delhi 
• Manual of Secondary Science Kit for Classes IX and X -  Published by NCERT

Websites:

• Boiling Point - Wikipedia, the free encyclopedia
• Difference Between Evaporation and Boiling - http://www.differencebetween.net
• Evaporation vs Boiling - http://www.differencebetween.com