Langley, R. W. (1980). Taxionomic studies in the asclepiadeae with particular reference to xysmalobium r. br. in southern africa.
Style de citation Chicago (17e éd.)Langley, Robert William. Taxionomic Studies in the Asclepiadeae with Particular Reference to Xysmalobium R. Br. in Southern Africa. 1980.
Style de citation MLA (8e éd.)Langley, Robert William. Taxionomic Studies in the Asclepiadeae with Particular Reference to Xysmalobium R. Br. in Southern Africa. 1980.
Attention : ces citations peuvent ne pas être correctes à 100%.