Citazione Stile APA (7a Edizione)

Dean, H., & North, S. (1929). Umbala: The adventures of a negro sea-captain in Africa and on the seven seas in his attempts to found an Ethiopian empire : an autobiographical narrative. George G. Harrap & Co..

Citazione stile Chigago Style (17a edizione)

Dean, Harry, e Sterling North. Umbala: The Adventures of a Negro Sea-captain in Africa and on the Seven Seas in His Attempts to Found an Ethiopian Empire : An Autobiographical Narrative. London: George G. Harrap & Co., 1929.

Citatione MLA (8a ed.)

Dean, Harry, e Sterling North. Umbala: The Adventures of a Negro Sea-captain in Africa and on the Seven Seas in His Attempts to Found an Ethiopian Empire : An Autobiographical Narrative. George G. Harrap & Co., 1929.