MLA

Dinkelsbuehl, Nicolaus de. Nicolaus De Dinkelsbuehl; Johannes Herolt, Etc. 1444. https://collections.library.yale.edu/catalog/2052985.

APA, 6th edition

Dinkelsbuehl, N. de. (1444). Nicolaus de Dinkelsbuehl; Johannes Herolt, etc [Early works to 1800, Manuscripts, Medieval Germany 15th century, Medieval and Renaissance Manuscripts in Beinecke Library]. https://collections.library.yale.edu/catalog/2052985.