APA-ийн эшлэл(7 дахь хэвлэлт)

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

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

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

MLA -ийн эшлэл (9 дэх хэвлэлт)

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