McMurtry, D. 1., Grobler, L. 1., Grobler, J. 1., Burns, S. 1., Williamson, G. 1., & Layden, W. 1. (2008). Field guide to the orchids of Northern South Africa and Swaziland. Hatfield, South Africa: UMDAUS Press.

McMurtry, Douglas 1944-, Lourens 1975- Grobler, Jolisa 1973- Grobler, Shane 1959- Burns, Graham 1932- Williamson, and Wilna 1950- Layden. Field Guide to the Orchids of Northern South Africa and Swaziland. Hatfield, South Africa: UMDAUS Press, 2008.

McMurtry, Douglas 1944-, et al. Field Guide to the Orchids of Northern South Africa and Swaziland. Hatfield, South Africa: UMDAUS Press, 2008.