Dunckel,Earl.B, & Reed, W. W. (1970). Business Environment of Seventees: A Trend Analysis For Business Planning. McGraw-Hill.
استشهاد بنمط شيكاغوDunckel,Earl.B, و William.K Wilson Reed. Business Environment of Seventees: A Trend Analysis For Business Planning. New York: McGraw-Hill, 1970.
MLA استشهادDunckel,Earl.B, و William.K Wilson Reed. Business Environment of Seventees: A Trend Analysis For Business Planning. McGraw-Hill, 1970.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.