New York: Brentano's* Ancient Egyptian Science: A Source Book by Marshall Clagett, 1989* The Instruction of Ptah-Hotep - AAA Encyclopedia* Texts from the Pyramid Age by Nigel C. Strudwick, Ronald J. Leprohon, 2005, Brill Academic Publishers* "Ptah-Hotep", "AfricaWithin.com"
New York: Brentano's* Texts from the Pyramid Age by Nigel C. Strudwick, Ronald J. Leprohon, 2005, Brill Academic Publishers* Ancient Egyptian Science: A Source Book by Marshall Clagett, 1989* The Instruction of Ptah-Hotep - AAA Encyclopedia