Cita APA (7th ed.)
Rensburg, W. C. J. v., Pretorius, D. A., & Glen, H. (1977). South Africa's strategic Minerals: Pieces on a continental chess board. Valiant Publ.
Cita Chicago (17th ed.)
Rensburg, W. C. J. van, D. A. Pretorius, i Helen Glen. South Africa's Strategic Minerals: Pieces on a Continental Chess Board. Johannesburg: Valiant Publ, 1977.
Cita MLA (9th ed.)
Rensburg, W. C. J. van, et al. South Africa's Strategic Minerals: Pieces on a Continental Chess Board. Valiant Publ, 1977.
Atenció: Aquestes cites poden no estar 100% correctes.