Bell, G. (2004). The permaculture way: Practical steps to create a self-sustaining world. Chelsea Green Pub. Co..
Cita Chicago Style (17a ed.)Bell, Graham. The Permaculture Way: Practical Steps to Create a Self-sustaining World. White River Junction, Vt.: Chelsea Green Pub. Co., 2004.
Cita MLA (8a ed.)Bell, Graham. The Permaculture Way: Practical Steps to Create a Self-sustaining World. Chelsea Green Pub. Co., 2004.
Precaución: Estas citas no son 100% exactas.