Geijsbeek, J. B., & Pacioli, L. (1974). Ancient double-entry bookkeeping: Lucas Pacioli's treatise (A.D. 1494, the earliest known writer on bookkeeping) reproduced and translated with reproductions, notes, and abstracts from Manzoni, Pietra, Mainardi, Ympyn, Stevin, and Dafforne. Houston: Scholars Book Co..

Geijsbeek, John B., and Luca Pacioli. Ancient Double-entry Bookkeeping: Lucas Pacioli's Treatise (A.D. 1494, the Earliest Known Writer On Bookkeeping) Reproduced and Translated With Reproductions, Notes, and Abstracts From Manzoni, Pietra, Mainardi, Ympyn, Stevin, and Dafforne. Houston: Scholars Book Co., 1974.

Geijsbeek, John B., and Luca Pacioli. Ancient Double-entry Bookkeeping: Lucas Pacioli's Treatise (A.D. 1494, the Earliest Known Writer On Bookkeeping) Reproduced and Translated With Reproductions, Notes, and Abstracts From Manzoni, Pietra, Mainardi, Ympyn, Stevin, and Dafforne. Houston: Scholars Book Co., 1974.