Prof. C. A. Bentley, C.I.E. In: Nature. Nr.164, 1949, S.1116, doi:10.1038/1641116b0 (englisch, Director of the London Office of the Dutch Cinchona Bureau).
Arjo Roersch Van Der Hoogte, Toine Pieters: Quinine, Malaria, and the Cinchona Bureau: Marketing Practices and Knowledge Circulation in a Dutch Transoceanic Cinchona–Quinine Enterprise (1920s–30s). In: Journal of the History of Medicine and Allied Sciences. Band71, Nr.2, April 2016, S.197–225, doi:10.1093/jhmas/jrv009, PMC 4887601 (freier Volltext) – (englisch).
Arjo Roersch Van Der Hoogte, Toine Pieters: Quinine, Malaria, and the Cinchona Bureau: Marketing Practices and Knowledge Circulation in a Dutch Transoceanic Cinchona–Quinine Enterprise (1920s–30s). In: Journal of the History of Medicine and Allied Sciences. Band71, Nr.2, April 2016, S.197–225, doi:10.1093/jhmas/jrv009, PMC 4887601 (freier Volltext) – (englisch).