APA (7th ed.) Citation

Grühl, M. (1932). The citadel of Ethiopia: The empire of the divine emperor. Cape.

Chicago Style (17th ed.) Citation

Grühl, Max. The Citadel of Ethiopia: The Empire of the Divine Emperor. London: Cape, 1932.

MLA (8th ed.) Citation

Grühl, Max. The Citadel of Ethiopia: The Empire of the Divine Emperor. Cape, 1932.

Warning: These citations may not always be 100% accurate.