Since the original poster is in the US, here's the FAA guidance:
JO 7110.65
5-6-2. METHODS
a. Vector aircraft by specifying:
1. Direction of turn, if appropriate, and magnetic heading to be flown, or
PHRASEOLOGY-
TURN LEFT/RIGHT HEADING (degrees).
FLY HEADING (degrees).
FLY PRESENT HEADING.
DEPART (fix) HEADING (degrees).
2. The number of degrees, in group form, to turn and the direction of turn, or
PHRASEOLOGY-
TURN (number of degrees) DEGREES LEFT/RIGHT.