Não informado. (1920). Gentes Herbarum: Occasional papers on the kinds of plants. L. H. Bailey Hortorium of the New York State College of Agriculture and Life Sciences.
Chicago-referens (17:e uppl.)Não informado. Gentes Herbarum: Occasional Papers on the Kinds of Plants. Ithaca, NY: L. H. Bailey Hortorium of the New York State College of Agriculture and Life Sciences, 1920.
MLA-referens (8:e uppl.)Não informado. Gentes Herbarum: Occasional Papers on the Kinds of Plants. L. H. Bailey Hortorium of the New York State College of Agriculture and Life Sciences, 1920.
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