@Room4Rent yes there is a format. See below.
Each employment reference must contain:
• Start and Finish Dates of Employment – these should be specific dates in a DD/MM/YY format
• Description of Duties Performed – Required to determine the relevance of the experience to the nominated occupation
• Hours worked - Full time or Part time –must be a minimum of 20 hours per week
• Country where Employment was undertaken
• Company Letterhead and signed by the author
• Certification as a valid copy