Não informado. (2020). Report of the Geological Survey of Natal and Zululand. P. Davis & Sons, Printers.
Chicago-Zitierstil (17. Ausg.)Não informado. Report of the Geological Survey of Natal and Zululand. Pietermaritzburg, Africa do Sul: P. Davis & Sons, Printers, 2020.
MLA-Zitierstil (8. Ausg.)Não informado. Report of the Geological Survey of Natal and Zululand. P. Davis & Sons, Printers, 2020.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.