Tafla, Bairu. “Peter Garretson, A Victorian Gentleman & Ethiopian Nationalist: The Life & Times of Hakim Warqenah, Dr. Charles Martin”. Aethiopica 17, no. 1 (July 19, 2014): 276–278. Accessed April 19, 2024. https://journals.sub.uni-hamburg.de/aethiopica/article/view/879.