MLA

Ibn al-Ṭabarī, Shihāb al-Dīn Aḥmad. [Risālah fī ladhdhāt al-ḥayāh] / Shihāb al-Dīn Aḥmad ibn al-Ṭabarī. -- [14--?].. [14--?]. https://collections.library.yale.edu/catalog/10461422.

APA, 6th edition

Ibn al-Ṭabarī, Shihāb al-Dīn Aḥmad. ([14--?])[[Risālah fī ladhdhāt al-ḥayāh] / Shihāb al-Dīn Aḥmad ibn al-Ṭabarī. -- [14--?].]. https://collections.library.yale.edu/catalog/10461422.