MLA

Mahdī, Muḥammad Aḥmad, 1848-1885. [Rasāʾil] / Muḥammad al-Mahdī ibn ʻAbd Allāh. -- [after 1885].. [after 1885]. https://collections.library.yale.edu/catalog/15821802.

APA, 6th edition

Mahdī, Muḥammad Aḥmad, 1848-1885. ([after 1885])[[Rasāʾil] / Muḥammad al-Mahdī ibn ʻAbd Allāh. -- [after 1885].]. https://collections.library.yale.edu/catalog/15821802.