Leisegang, Ioannes. "Prolegomena". Vol VII, Pars 1 Indices: Editio maior, Berlin, Boston: De Gruyter, 1963, pp. V-VII. https://doi.org/10.1515/9783110921618.v
Leisegang, I. (1963). Prolegomena. In Vol VII, Pars 1 Indices: Editio maior (pp. V-VII). Berlin, Boston: De Gruyter. https://doi.org/10.1515/9783110921618.v