You need to submit following for your experience
Notarized employment contracts from your present and past employers,
accompanied by an English or French translation
Original and up-to-date letters of reference from your past and current employers.
Letters must be written on company letterhead and show the company’s full
address, telephone and fax numbers, and be stamped with the company’s official
seal
Please check details for Indian Visa office requirements at
http://www.cic.gc.ca/english/pdf/kits/guides/E37029.pdf