APA (7th ed.) Citation

Chilvers, H. A. (1929). The seven wonders of southern Africa. [publisher not identified].

Chicago Style (17th ed.) Citation

Chilvers, Hedley A. The Seven Wonders of Southern Africa. Johannesburg: [publisher not identified], 1929.

MLA (9th ed.) Citation

Chilvers, Hedley A. The Seven Wonders of Southern Africa. [publisher not identified], 1929.