ibn Taghri Birdi, Abu L-Mahasin (1954). History of Egypt, 1382-1469 A.D. Translated by Yusef, William Popper. University of California Press. ASINB000KJB70S.
Winn, W. (December 1989). "The role of graphics in training documents: toward an explanatory theory of how they communicate". IEEE Transactions on Professional Communication. 32 (4): 300–309. doi:10.1109/47.44544.