MLA

Kitāb thābit fī aḥkām Al-buyūʻ : Manuscript. 18AD. https://collections.library.yale.edu/catalog/10842246.

APA, 6th edition

Kitāb thābit fī aḥkām al-buyūʻ : manuscript. (18 C.E.). [Manuscripts, Arabic--18th century.]. https://collections.library.yale.edu/catalog/10842246.