Bio-dynamic Farming and Gardening Association. (1941). Bio-dynamics. Bio-Dynamic Farming and Gardening Association.
Chicago-referens (17:e uppl.)Bio-dynamic Farming and Gardening Association. Bio-dynamics. Phoenixville, Pa.: Bio-Dynamic Farming and Gardening Association, 1941.
MLA-referens (8:e uppl.)Bio-dynamic Farming and Gardening Association. Bio-dynamics. Bio-Dynamic Farming and Gardening Association, 1941.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.