Παραπομπή σε μορφή APA (7η εκδ.)

Nasif, A. A. (1988). AL-‘ULA: On system : an historical and archaeological survey with special reference to its irrigatin. king saud university.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Nasif, Abdallah Adam. AL-‘ULA: On System : An Historical and Archaeological Survey with Special Reference to Its Irrigatin. Riyadh: king saud university, 1988.

Παραπομπή σε μορφή MLA (9th εκδ.)

Nasif, Abdallah Adam. AL-‘ULA: On System : An Historical and Archaeological Survey with Special Reference to Its Irrigatin. king saud university, 1988.