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.
Παραπομπή σε μορφή Chicago (17η εκδ.)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.
Παραπομπή σε μορφή MLA (8th εκδ.)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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