2015 Biodynamic Lunar and Planetary Calendar[liên kết hỏng]; Desmond Ansel Jolly, Isabella Kenfield, California's New Green Revolution: Pioneers in Sustainable Agriculture, University of California Small Farm Program 2008, p. 114; Carl F. Jordan, An Ecosystem Approach to Sustainable Agriculture, Springer 2013, p. 126; Arnaldo Walter and Pedro Gerber Machado, "Socio-Economic Impacts of Bioethanol from Sugarcane in Brazil", in Socio-Economic Impacts of Bioenergy Production Dominik Rutz, Rainer Janssen (eds.), Springer 2014 ISBN978-3-319-03828-5 pp. 193–215. p. 208; Board on Agriculture and Natural Resources, Committee on Twenty-First Century Systems Agriculture, Division on Earth and Life Studies, National Research Council, Toward Sustainable Agricultural Systems in the 21st Century, National Academies Press 2010. ISBN978-0-309-14896-2 p. 21
Lotter, Donald W. (2003). "Organic Agriculture". Journal of Sustainable Agriculture. Quyển 21 số 4. tr. 59–128. doi:10.1300/J064v21n04_06. ISSN1044-0046.
2015 Biodynamic Lunar and Planetary Calendar[liên kết hỏng]; Desmond Ansel Jolly, Isabella Kenfield, California's New Green Revolution: Pioneers in Sustainable Agriculture, University of California Small Farm Program 2008, p. 114; Carl F. Jordan, An Ecosystem Approach to Sustainable Agriculture, Springer 2013, p. 126; Arnaldo Walter and Pedro Gerber Machado, "Socio-Economic Impacts of Bioethanol from Sugarcane in Brazil", in Socio-Economic Impacts of Bioenergy Production Dominik Rutz, Rainer Janssen (eds.), Springer 2014 ISBN978-3-319-03828-5 pp. 193–215. p. 208; Board on Agriculture and Natural Resources, Committee on Twenty-First Century Systems Agriculture, Division on Earth and Life Studies, National Research Council, Toward Sustainable Agricultural Systems in the 21st Century, National Academies Press 2010. ISBN978-0-309-14896-2 p. 21
Lotter, Donald W. (2003). "Organic Agriculture". Journal of Sustainable Agriculture. Quyển 21 số 4. tr. 59–128. doi:10.1300/J064v21n04_06. ISSN1044-0046.
