Mark W. Skinner: Lilium parryi. In: Flora of North America. Band26. Oxford University Press, Oxford 2003, ISBN 978-0-19-515208-1, S.191 (online [abgerufen am 30. Dezember 2009]).
jstor.org
Verne Grant: The Systematic and Geographical Distribution of Hawkmoth Flowers in the Temperate North American Flora. In: Botanical Gazette. Band144, Nr.3, September 1983, S.439–449, JSTOR:2474443.
