Cita APA (7a ed.)

Langley, R. W. (1980). Taxionomic studies in the asclepiadeae with particular reference to xysmalobium r. br. in southern africa.

Cita Chicago Style (17a ed.)

Langley, Robert William. Taxionomic Studies in the Asclepiadeae with Particular Reference to Xysmalobium R. Br. in Southern Africa. 1980.

Cita MLA (8a ed.)

Langley, Robert William. Taxionomic Studies in the Asclepiadeae with Particular Reference to Xysmalobium R. Br. in Southern Africa. 1980.