Ristau, R. A. (1997). Introduction to business (3rd ed.). Cincinnati, OH: South-Western Educational Publ.
استشهاد بنمط شيكاغوRistau, Robert A. Introduction to Business. 3rd ed. Cincinnati, OH: South-Western Educational Publ, 1997.
MLA استشهادRistau, Robert A. Introduction to Business. 3rd ed. Cincinnati, OH: South-Western Educational Publ, 1997.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.