Loganiaceae is die Klapper-familie . Daar is meer as 400 spesies wêreldwyd wat tot die familie hoort waarvan 30 in Suider-Afrika voorkom en almal is bome .
↑ 1,0 1,1 "Family: Loganiaceae R. Br. ex Mart., nom. cons" . Germplasm Resources Information Network . United States Department of Agriculture. 17 Januarie 2003. Geargiveer vanaf die oorspronklike op 10 Oktober 2012. Besoek op 15 Desember 2010 .
↑ Angiosperm Phylogeny Group (2009). "An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG III" (PDF) . Botanical Journal of the Linnean Society . 161 (2): 105–121. doi :10.1111/j.1095-8339.2009.00996.x . Besoek op 6 Julie 2013 .
↑ "GRIN Genera Records of Loganiaceae " . Germplasm Resources Information Network . United States Department of Agriculture. Geargiveer vanaf die oorspronklike op 18 November 2004. Besoek op 15 Desember 2010 .