Holmgren, D. (2002). Permaculture: Principles and pathways beyond sustainability. Holmgren design services.
Citace podle Chicago (17th ed.)Holmgren, David. Permaculture: Principles and Pathways Beyond Sustainability. Victoria: Holmgren design services, 2002.
Citace podle MLA (9th ed.)Holmgren, David. Permaculture: Principles and Pathways Beyond Sustainability. Holmgren design services, 2002.
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