APA (7th ed.) Citation

Villiers, P. d., & Tolmie, D. Preface. University of the Free State.

Chicago Style (17th ed.) Citation

Villiers, P.G.R. de, and D.F Tolmie. Preface. University of the Free State.

MLA (9th ed.) Citation

Villiers, P.G.R. de, and D.F Tolmie. Preface. University of the Free State.

Warning: These citations may not always be 100% accurate.