MLA

Theodosius, active 1st century B.C. Kitāb al-ukar / [Theodosius].. [17--?]. https://collections.library.yale.edu/catalog/16051899.

APA, 6th edition

Theodosius, active 1st century B.C. ([17--?])[Kitāb al-ukar / [Theodosius].]. https://collections.library.yale.edu/catalog/16051899.