Παραπομπή σε μορφή APA (7η εκδ.)

The institute of national planning, Elrayes, a., & Nosseir, a. (2010). Using pepa to model the unemployment problem. The institute of national planning.

Παραπομπή σε μορφή Chicago (17η εκδ.)

The institute of national planning, amani Elrayes, και ann Nosseir. Using Pepa to Model the Unemployment Problem. cairo: The institute of national planning, 2010.

Παραπομπή σε μορφή MLA (9th εκδ.)

The institute of national planning, et al. Using Pepa to Model the Unemployment Problem. The institute of national planning, 2010.