Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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