Coba jelasin History of Rhododendrons dari Rhododendron dong

Historical Survey of Rhododendron Collecting - With Emphasis on its Close Associations with Horticulture

Rhododendron in botanical garden Pruhonice-Czech republic

Flora of North America: Rhododendron

Journal of the American Rhododendron Society (JARS) 1947-1996

The Rhododendron, Camellia & Magnolia Group of the Royal Horticultural Society

Rhododendron Species Foundation and Botanical Garden

Royal Botanic Garden Edinburgh: Rhododendron Publications

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