“Andries Pretorius Se Grondverkopings in Graaffreinet, 1837 Tot 1838 : ’n Hersiening Van Dr. G.S.Preller Se Gevolgtrekkings ”. Historia, vol. 16, no. 1, July 2021, https://upjournals.up.ac.za/index.php/historia/article/view/2827.