15.
http://www.sterlinggreenery.com/pond_store.html [Capaian 15 Ogos 2012].
16.
http://www.gwarlingo.com/tag/gardens/ [Capaian 15 Ogos 2012].
17.
http://www.arboretum.umn.edu/UserFiles/ImaGreenRoofCol1Pix3.jpg [Capaian 1 Jun 2010].
18.
httpwww.majoracartergroup.comservicescase-historiesbest-green-jobtraining-program [Capaian 21 Disember 2011].
19.
http://www.bcgreenroofs.ca [Capaian 9 Disember 2009].
20.
http://www.cityfarmer.org [Capaian 7 Ogos 2009].
21.
http://www.greenbuildingindex.org [Capaian 9 Disember 2009].
22.
http://www.skyrisegreenery.com [Capaian 4 November 2009].
23.
http://www.toronto.ca [Capaian 28 Januari 2010].