Hi kg.jadu, here is the reference letter for RA:
Re: Confirmation of Ms. XXX Research Assistantship
To whom it may concern
I am writing to confirm that Ms. XXX is a PhD student who has been working in my research laboratory, paid as a full-time research assistant (RA) in Chemistry Department at XXX, city, Ontario, Canada since Sep 2009. She works 25 hours per week, with annual salary of CAN$ 20400. This employment will continue until her PhD graduation, with an expected date around August 2014. She has also been teaching assistant (TA) of several courses in our department.
As a research assistant, Ms. XXX is responsible for conducting literature reviews, performing experiments in the laboratory, analysis and interpretation of research results, and preparation of journal and conference papers. Her current research focuses on XXX
Demonstrating high intellectual ability and high caliber in her research, she has made remarkable achievements and contributions, published in conferences and journal papers. In summary, I believe strongly in potential of Ms. XXX as a talented and diligent researcher, which can make contributions to Canadian society, and therefore, I strongly support her application for Canadian permanent residency.