Heyel, C. (1958). Appraising executive performance. American Management Association.
استشهاد بنمط شيكاغوHeyel, Carl. Appraising Executive Performance. New York: American Management Association, 1958.
MLA استشهادHeyel, Carl. Appraising Executive Performance. American Management Association, 1958.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.