Rowley, H. (1881). Twenty years in central Africa: Being the story of the Universities' Mission to Central Africa, from its commencement under Bishop Mackenzie to the present time. London: W. Gardner, Darton.

Rowley, Henry. Twenty Years in Central Africa: Being the Story of the Universities' Mission to Central Africa, From Its Commencement Under Bishop Mackenzie to the Present Time. London: W. Gardner, Darton, 1881.

Rowley, Henry. Twenty Years in Central Africa: Being the Story of the Universities' Mission to Central Africa, From Its Commencement Under Bishop Mackenzie to the Present Time. London: W. Gardner, Darton, 1881.