Pop Icon Mr. Cold Call
ASKING FOR REFERRALS CAN BE A BIT AWKWARD - TRY THIS

In order to get new business from existing clients you're best best is not to ask directly for a referral, but rather to ask for an introduction.  Asking for referrals can be a bit awkward and many clients while "happy" with your service may come across a bit evasive when asked.  Your fastest route to generate new business is when you ask your client for permission to either be "introduced" or to "introduce" yourself to a strategic partner in their rolodex.  See the following example:
 
"(First name of client), I was just wondering if you I can introduce myself to (Insert the name of the person you want to be introduced to and this person could be someone that your client had mentioned by name in a previous call or this person could be their accountant) as your (Insert your profession here, so for example, if you sell auto insurance then you would say, "Auto Insurance Agent," or if you design business collateral then you would say, "Graphic Designer.")?"

If your client agrees then offer to send an email to your client to forward to their "strategic partner" and then have them cc you on this email.  Or, you could have your client send an email to their contact directly indicating that you will be contacting them to introduce yourself.  Your success at this strategy will come down to one factor and this factor is called TESTING.
Did you know that Pop Icon has a Downloadable Cold Calling Series that