Nkandeu, Danielle Sandra; Van den Bout, Jan Iman; Cronjé, Marianne J.; Van Papendorp, D.H. (Dirk Hermanus), 1949-; Joubert, Anna Margaretha(Karger Publishers, 2018)
Mothibeli, K.T.; Mercier, Anne Elisabeth; Cromarty, Allan Duncan; Rheeder, M.; Naidoo, Vinny; Olorunju, S.A.S.; Joubert, Anna Margaretha(Allied Academies, 2018)