Lopez, R. H. (1970). The ethylene-producing industry: Its growth and regional distribution in the United States. New York: Praeger Publishers.
استشهاد بنمط شيكاغوLopez, Raymond Henry. The Ethylene-producing Industry: Its Growth and Regional Distribution in the United States. New York: Praeger Publishers, 1970.
MLA استشهادLopez, Raymond Henry. The Ethylene-producing Industry: Its Growth and Regional Distribution in the United States. New York: Praeger Publishers, 1970.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.