Lüdi, W. (1951). Nationalpark, Buffalora, Dryas octopetala (+Hippocrepis comosa). ETH-Bibliothek Zürich, Bildarchiv.
Chicago Style (17th ed.) CitationLüdi, Werner. Nationalpark, Buffalora, Dryas Octopetala (+Hippocrepis Comosa). ETH-Bibliothek Zürich, Bildarchiv, 1951.
MLA (8th ed.) CitationLüdi, Werner. Nationalpark, Buffalora, Dryas Octopetala (+Hippocrepis Comosa). ETH-Bibliothek Zürich, Bildarchiv, 1951.
Warning: These citations may not always be 100% accurate.