Cita APA (7a ed.)

Cavagnaro, E., & Curiel, G. (2012). The three levels of sustainability. Greenleaf Pub.

Cita Chicago Style (17a ed.)

Cavagnaro, Elena, y George Curiel. The Three Levels of Sustainability. Sheffield, South Yorkshire, England: Greenleaf Pub, 2012.

Cita MLA (9a ed.)

Cavagnaro, Elena, y George Curiel. The Three Levels of Sustainability. Greenleaf Pub, 2012.