एपीए उद्धरण

Hahn, A. V. G. (1970). The petrochemical industry: Market and economics. New York: McGraw-Hill.

शिकागो स्टाइल उद्धरण

Hahn, Albert V. G. The Petrochemical Industry: Market and Economics. New York: McGraw-Hill, 1970.

एमएलए उद्धरण

Hahn, Albert V. G. The Petrochemical Industry: Market and Economics. New York: McGraw-Hill, 1970.