Krul, W. 1994. J.F. Heijbroek, E.L. Wouthuysen, Kunst, kennis en commercie. De kunsthandelaar J. H. de Bois 1878-1946. BMGN - Low Countries Historical Review. 109, 3 (Jan. 1994), 494–495. DOI:https://doi.org/10.18352/bmgn-lchr.3903.