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.
worldcat.org
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.