They would be able to see them only by referral through the approval of a "gatekeeper" physician.

The community center will continue to operate by appointment and referral only, said Ms. Henkin.

Their mission is to develop alternative teaching and learning methods, and enrollment is by referral only.

Mr Chambers' marketing efforts have been direct, including cold calling, but a large amount of his work now comes by referral.

Luckily, she gets most of her clients by referral.

As a chronic care facility, St. Peter's admits patients by referral and has no emergency room accessible to the public.

Access to a specialist is only by referral and may take months to obtain.

They only want to work by referral.

As you know, every step of the process is by referral, and we were happy that your doctor chose to confide in you.

Celebrities and the well-off were the company's mainstay, all of whom came by referral, as the company did not advertise.