Websites We Used

http://www.thefreedictionary.com/
http://www.wikipedia.org/
http://www.differencebetween.net/
http://wiki.answers.com/
http://thedifferencebetween.com/

Databases We Used

http://www.eric.ed.gov/
http://elibrary.bigchalk.com/

Image Sites

http://www.swordssource.com/ 
http://www.kaswords.com/
http://www.trueswords.com/
http://www.japanese-samurai-swords.com/
http://www.allninjagear.com/
http://www.buy-swords.com/images/ninja-sword.jpg
http://www.samurai-swords-for-sale.com/store/images/P/japanese-swords-rittersteel-katana-ninja.jpg
http://www.extremeblades.com/wp-content/uploads/2010/03/ninja_swords.jpg
http://www.edmwi.com/shop/images/DSC04552.jpg

Books

Secrets of the NINJA by Ashida Kim
Published in 2000 by Ashida Kim

Secrets of the Ninja by Ashida Kim