MLA

Ibn Abī ʻAṣrūn, ʻAbd Allāh ibn Muḥammad, ca. 1099-1189. Ṣafwat al-madhhab min Nihāyat al-maṭlab : al-juzʾ al-thānī / ʻAbd Allāh ibn Muḥammad ibn Abī ʻAṣrūn.. [12--?]. https://collections.library.yale.edu/catalog/16472936.

APA, 6th edition

Ibn Abī ʻAṣrūn, ʻAbd Allāh ibn Muḥammad, ca. 1099-1189. ([12--?])[Ṣafwat al-madhhab min Nihāyat al-maṭlab : al-juzʾ al-thānī / ʻAbd Allāh ibn Muḥammad ibn Abī ʻAṣrūn.]. https://collections.library.yale.edu/catalog/16472936.