I dont tink you can create a reference letter yourself, its usually issued by the place you are working,
here is an example of reference letter
it will be of letter headed paper of the company, now the adress will be to Citizensip and immigration canada[there full adress] then Dear sir,
letter of reference for ,,,,,,,, you put your name
this is to certify that the above named candidate worked with us as ,,,,,,,,,,,,,, e.g a computer engineer between 1992 till date, now u can go further, his a hardworking and reliable woker
we sincecerly recoment him for any positoin or program his applying with your organisation
Yours faithfully
signature
ayokunlex01 folorunsho
General manager
+1204 677 008[the managers number]