Wasserman, P., Georgi, C., & Way, J. (1980). Encyclopeadia of business information sources (4th ed.). Gale Research Company.
استشهاد بنمط شيكاغوWasserman, Paul, Charles Georgi, و James Way. Encyclopeadia of Business Information Sources. 4th ed. Detroit: Gale Research Company, 1980.
MLA استشهادWasserman, Paul, et al. Encyclopeadia of Business Information Sources. 4th ed. Gale Research Company, 1980.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.