APA (7th ed.) Citation

Chilvers, H. A. (1929). The seven wonders of southern Africa. [s.n.].

Chicago Style (17th ed.) Citation

Chilvers, Hedley Arthur. The Seven Wonders of Southern Africa. Johannesburg: [s.n.], 1929.

MLA (9th ed.) Citation

Chilvers, Hedley Arthur. The Seven Wonders of Southern Africa. [s.n.], 1929.