Darnell, A. W. Orchids for the outdoor garden: A descriptive list of the world's orchids, for the use of amateur gardeners.
Chicago-referens (17:e uppl.)Darnell, Anthony William. Orchids for the Outdoor Garden: A Descriptive List of the World's Orchids, for the Use of Amateur Gardeners.
MLA-referens (8:e uppl.)Darnell, Anthony William. Orchids for the Outdoor Garden: A Descriptive List of the World's Orchids, for the Use of Amateur Gardeners.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.