एपीए उद्धरण

David Hitchens. (2000). Environmental regulation and competitive advantage. Northampton: Edward Elgar Publishing, Inc.

शिकागो स्टाइल उद्धरण

David Hitchens. Environmental Regulation and Competitive Advantage. Northampton: Edward Elgar Publishing, Inc, 2000.

एमएलए उद्धरण

David Hitchens. Environmental Regulation and Competitive Advantage. Northampton: Edward Elgar Publishing, Inc, 2000.