Held, G. (1991). The equipment acquisition book: What, when, where, and how to buy. New York: Van Nostrand Reinhold.
استشهاد بنمط شيكاغوHeld, Gilbert. The Equipment Acquisition Book: What, When, Where, and How to Buy. New York: Van Nostrand Reinhold, 1991.
MLA استشهادHeld, Gilbert. The Equipment Acquisition Book: What, When, Where, and How to Buy. New York: Van Nostrand Reinhold, 1991.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.