Não informado. (1978). Monographs in Systematic Botany from the Missouri Botanical Garden. Missouri Botanical Garden.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Monographs in Systematic Botany from the Missouri Botanical Garden. Saint Louis, Mo: Missouri Botanical Garden, 1978.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Monographs in Systematic Botany from the Missouri Botanical Garden. Missouri Botanical Garden, 1978.
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