Karyeija, R. F. (1999). The variability of and resistance to sweet potato feathery mottle virus in Africa. Swedish University of Agricultural Sciences.
Chicago-referens (17:e uppl.)Karyeija, Robert F. The Variability of and Resistance to Sweet Potato Feathery Mottle Virus in Africa. Uppsala: Swedish University of Agricultural Sciences, 1999.
MLA-referens (8:e uppl.)Karyeija, Robert F. The Variability of and Resistance to Sweet Potato Feathery Mottle Virus in Africa. Swedish University of Agricultural Sciences, 1999.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.