Bastin, John (1973). "Dr Joseph Arnold and the discovery of the Rafflesia arnoldi in West Sumatra in 1818" (in en). Journal of the Society for the Bibliography of Natural History6 (5): 305–372. doi:10.3366/jsbnh.1973.6.5.305. பன்னாட்டுத் தர தொடர் எண்:0037-9778.
Bastin, John (1973). "Dr Joseph Arnold and the discovery of the Rafflesia arnoldi in West Sumatra in 1818" (in en). Journal of the Society for the Bibliography of Natural History6 (5): 305–372. doi:10.3366/jsbnh.1973.6.5.305. பன்னாட்டுத் தர தொடர் எண்:0037-9778.