एपीए उद्धरण

Willig, J. T. (1995). Auditing for environmental quality leadership: Beyond compliance to environmental excellence. John Wiley.

शिकागो स्टाइल उद्धरण

Willig, John T. Auditing for Environmental Quality Leadership: Beyond Compliance to Environmental Excellence. New York: John Wiley, 1995.

एमएलए उद्धरण

Willig, John T. Auditing for Environmental Quality Leadership: Beyond Compliance to Environmental Excellence. John Wiley, 1995.