Fru, Felix Fon; Steenkamp, Emma Theodora; Wingfield, Michael J.; Roux, Jolanda(NISC (Pty) Ltd and Informa UK Limited (trading as Taylor & Francis Group), 2019)
Coetzee, Martin Petrus Albertus; Musasira, N.Y.; Roux, Jolanda; Roets, F.; Van der Merwe, Nicolaas Albertus (Albie); Wingfield, Michael J.(Wiley, 2018-05)