古代エジプト人の魂
Allen, James Paul. 2001. "Ba". In The Oxford Encyclopedia of Ancient Egypt, edited by Donald Bruce Redford. Vol. 1 of 3 vols. Oxford, New York, and Cairo: Oxford University Press and The American University in Cairo Press. 161–162.
Allen, James P. 2000. "Middle Egyptian: An Introduction to the Language and Culture of Hieroglyphs", Cambridge University Press.
Borghouts, Joris Frans. 1982. "Divine Intervention in Ancient Egypt and Its Manifestation (b3w)". In Gleanings from Deir el-Medîna, edited by Robert Johannes Demarée and Jacobus Johannes Janssen.