I have search google "CIC Visitor visa" and found these two links
Information and instructions
http://www.cic.gc.ca/english/information/applications/guides/5256ETOC.asp
Application
http://www.cic.gc.ca/english/information/applications/visa.asp
You can apply online and paper as well
For Super Visa your account (a Smart accountant ) may be able to tell how you can show your cash earned or part time job money also as income. I assume you may be doing part time job on Cash and some time we don't think that as our income
Hope this helps.
I am not consultant. Just telling from my own experience
Good luck