.Brown, S. L., & Errera, S. (1987). Trading energy futures: A manual for energy industry professionals. Quorum Books.
Citazione stile Chigago Style (17a edizione).Brown, Stewart L., e Steven Errera. Trading Energy Futures: A Manual for Energy Industry Professionals. New York: Quorum Books, 1987.
Citatione MLA (9a ed.).Brown, Stewart L., e Steven Errera. Trading Energy Futures: A Manual for Energy Industry Professionals. Quorum Books, 1987.