.Brown, S. L., & Errera, S. (1987). Trading energy futures: A manual for energy industry professionals. Quorum Books.
Цитирование в стиле Чикаго (17-е изд.).Brown, Stewart L., и Steven Errera. Trading Energy Futures: A Manual for Energy Industry Professionals. New York: Quorum Books, 1987.
Цитирование MLA (9-е изд.).Brown, Stewart L., и Steven Errera. Trading Energy Futures: A Manual for Energy Industry Professionals. Quorum Books, 1987.