Wettere, P. H. J. V. (1975). A study on the ecology of Glossina palpalis palpalis (Rob.-desv. 1830) in lower Zaire in connection with the epidemiology of human sleeping sickness caused by Trypanosoma brucei gambiense. University of Utrecht.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Wettere, Paul Hendrik Jan Van. A Study on the Ecology of Glossina Palpalis Palpalis (Rob.-desv. 1830) in Lower Zaire in Connection with the Epidemiology of Human Sleeping Sickness Caused by Trypanosoma Brucei Gambiense. Utrecht: University of Utrecht, 1975.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Wettere, Paul Hendrik Jan Van. A Study on the Ecology of Glossina Palpalis Palpalis (Rob.-desv. 1830) in Lower Zaire in Connection with the Epidemiology of Human Sleeping Sickness Caused by Trypanosoma Brucei Gambiense. University of Utrecht, 1975.