Converting Date To Other Format?

I am using SQL server 2008 R2. I have a query where I have dates in different columns pulled from my database among other things. The client is requiring that the date be formatted as mmddyyyy. The database returns the date value as varchar (8) and formatted as yyyymmdd. I have tried several things to get this to be converted but haven't had any luck. My query is as follows.

select appointments.last_name as 'patient last name', appointments.first_name as 'patient first name', appointments.address_line_1, appointments.address_line_2, appointments.city,
appointments.state, appointments.zip, appointments.home_phone, appointments.appt_nbr, appointments.appt_date, person.date_of_birth,
person.sex, patient.med_rec_nbr, provider_mstr.national_provider_id, provider_mstr.first_name,

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