Willig, J. T. (1995). Auditing for environmental quality leadership: Beyond compliance to environmental excellence. John Wiley.
শিকাগো স্টাইলে সাইটেশনWillig, John T. Auditing for Environmental Quality Leadership: Beyond Compliance to Environmental Excellence. New York: John Wiley, 1995.
এমএলএ সাইটেশনWillig, John T. Auditing for Environmental Quality Leadership: Beyond Compliance to Environmental Excellence. John Wiley, 1995.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.