APA (7th ed.) Citation

De Villiers, C. (1976). African problems and challenges. Valiant.

Chicago Style (17th ed.) Citation

De Villiers, Cas. African Problems and Challenges. Sandton, South Africa: Valiant, 1976.

MLA (8th ed.) Citation

De Villiers, Cas. African Problems and Challenges. Valiant, 1976.