Cite

Tractatus de sphaera

MLA

Sacro Bosco, Joannes de, fl. 1230. Tractatus de sphaera. [between 1450 and 1500]. https://collections.library.yale.edu/catalog/10952178.

APA, 6th edition

Sacro Bosco, Joannes de, fl. 1230. ([between 1450 and 1500])[Tractatus de sphaera]. https://collections.library.yale.edu/catalog/10952178.