Cita APA (7th ed.)

Wells, D. T. (1996). Environmental policy: A global perspective for the twenty-first century. Prentice Hall.

Cita Chicago (17th ed.)

Wells, Donald T. Environmental Policy: A Global Perspective for the Twenty-first Century. Upper Saddle River, N.J: Prentice Hall, 1996.

Cita MLA (9th ed.)

Wells, Donald T. Environmental Policy: A Global Perspective for the Twenty-first Century. Prentice Hall, 1996.