MLA

Ludolf, von Sudheim, active 14th century, author. Prologus in libr[o] d[omi]ni ludolphi de suchen. de t[er]ra sa[n]cta et itinere iherosolimitano et de statu ei[us] et p[rin]cipue alijs mirabilibus que in mari conspiciuntur videlic[et] medit[er]raneo. [approximately 1483-1485]. https://collections.library.yale.edu/catalog/33488195.

APA, 6th edition

Ludolf, von Sudheim, active 14th century, author. ([approximately 1483-1485])[Prologus in libr[o] d[omi]ni ludolphi de suchen. de t[er]ra sa[n]cta et itinere iherosolimitano et de statu ei[us] et p[rin]cipue alijs mirabilibus que in mari conspiciuntur videlic[et] medit[er]raneo]. https://collections.library.yale.edu/catalog/33488195.