Cita APA (7th ed.)

Hahn, A. V., Williams, R., & Zabel, H. (1970). The petrochemical industry: Market and economics. McGraw-Hill.

Cita Chicago (17th ed.)

Hahn, Albert V., Roger Williams, i Herman Zabel. The Petrochemical Industry: Market and Economics. New York: McGraw-Hill, 1970.

Cita MLA (8th ed.)

Hahn, Albert V., et al. The Petrochemical Industry: Market and Economics. McGraw-Hill, 1970.