Cita APA (7a ed.)

Köhn, J. (1999). Sustainability in question: The search for a conceptual framework. Edward Elgar.

Cita Chicago Style (17a ed.)

Köhn, Jörg. Sustainability in Question: The Search for a Conceptual Framework. Cheltenham [etc.]: Edward Elgar, 1999.

Cita MLA (9a ed.)

Köhn, Jörg. Sustainability in Question: The Search for a Conceptual Framework. Edward Elgar, 1999.