MLA

Shādhilī, Abū al-Ḥasan ʻAlī ibn ʻAbd Allāh, ca. 1196-1258. al-Khuṣūṣ wa-al-ʻumūm / ʻAlī ibn ʻAbd Allāh al-Shādhilī. -- [14--?].. [14--?]. https://collections.library.yale.edu/catalog/10461423.

APA, 6th edition

Shādhilī, Abū al-Ḥasan ʻAlī ibn ʻAbd Allāh, ca. 1196-1258. ([14--?])[al-Khuṣūṣ wa-al-ʻumūm / ʻAlī ibn ʻAbd Allāh al-Shādhilī. -- [14--?].]. https://collections.library.yale.edu/catalog/10461423.