Official instructions on How to prepare documents for application you can find at official instructions on Application web page.
You can find there English and French versions and links to additional instructions regarding what else you might need.
Or you can use our Manual, where you will find detailed explanation of everything you need in one place, everything that must be in the Application package, all explained in English and Russian side by side, including the latest changes in the CIC regulations made in July 2011, November 2011 and February 2012.
You can find there - all forms in one place and detailed description of every question from every Form with examples and comments. Comments that have many years and many people experience in it.
Also you will find there examples of all attachments, that you will have to prepare and fill in and include to the submitted package.
To buy and download the Manual use the link - Manual: How to sponsor spouse.