Majid Nawaz said:
Instead of Reference letter, will the appointment letter works?
No, reference letter is the most important document. I have read on the forum that application packages have been returned on account of missing reference letter (even though all other work experience documents were submitted).
May be you can check out this link for more details on Reference Letter and the format in which you need top get it. http://www.canadavisa.com/canada-immigration-discussion-board/nail-the-challenge-of-getting-reference-letter-from-current-employer-t397796.0.html