MLA

Iacobus, of Speyer. Iudicium Astrologicum for 1475. 1474. https://collections.library.yale.edu/catalog/10521479.

APA, 6th edition

Iacobus, of S. (1474). Iudicium astrologicum for 1475 [Early works to 1800, Manuscripts, Medieval Italy 15th century, Medieval and Renaissance Manuscripts in Beinecke Library]. https://collections.library.yale.edu/catalog/10521479.