APA (7th ed.) Citation

Simons, H. J., & Simons, R. E. (1969). Class and colour in South Africa, 1850-1950. Penguin Books.

Chicago Style (17th ed.) Citation

Simons, H. J., and R. E. Simons. Class and Colour in South Africa, 1850-1950. Harmondsworth: Penguin Books, 1969.

MLA (9th ed.) Citation

Simons, H. J., and R. E. Simons. Class and Colour in South Africa, 1850-1950. Penguin Books, 1969.