@ roxaida.. what I know is you need an employer to prove that you have a work to support your self when you come back here in Canada.
Try to check on this CIC website if it help you: http://www.cic.gc.ca/english/information/applications/visa.asp
or straight here: http://www.cic.gc.ca/english/information/applications/guides/5256E2.asp (outside Canada means when you are here in Canada right now, you need to sent your application on nearest Canadian Embassy where you live, like me I leave in Ontario, so the nearest is on Buffalo, NY USA.)
or.. it is better to call CIC and ask an agent regarding your query, I know they could advice you more better of what you to do!
Try to call @ 8 in the morning, as soon they open, so not you wait longer on the line. Goodluck!