Tohutoro APA (7th ed.)

.Brown, S. L., & Errera, S. (1987). Trading energy futures: A manual for energy industry professionals. Quorum Books.

Tohutoru Kātū Chicago (17th ed.)

.Brown, Stewart L., me Steven Errera. Trading Energy Futures: A Manual for Energy Industry Professionals. New York: Quorum Books, 1987.

Tohutoro MLA (9th ed.)

.Brown, Stewart L., me Steven Errera. Trading Energy Futures: A Manual for Energy Industry Professionals. Quorum Books, 1987.