Olmstead. Gardening with Native Plants of the Pacific Northwest. University of Washington Press.
Citazione stile Chigago Style (17a edizione)Olmstead. Gardening with Native Plants of the Pacific Northwest. University of Washington Press.
Citatione MLA (8a ed.)Olmstead. Gardening with Native Plants of the Pacific Northwest. University of Washington Press.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.