(2013). Ecological sustainability: Understanding complex issues / Robert B. Northrop, Anne N. Connor.
Cita Chicago (17th ed.)Ecological Sustainability: Understanding Complex Issues / Robert B. Northrop, Anne N. Connor. 2013.
Cita MLA (9th ed.)Ecological Sustainability: Understanding Complex Issues / Robert B. Northrop, Anne N. Connor. 2013.
Atenció: Aquestes cites poden no estar 100% correctes.