Παραπομπή σε μορφή APA (7η εκδ.)

abdel hady, a. m., omara, a., & vlotman w. f. (2003). An Investigation of clay percentage at abu matamir area for envelope need deremination. drainage research institute.

Παραπομπή σε μορφή Chicago (17η εκδ.)

abdel hady, ahmed m., akmal omara, και vlotman w. f. An Investigation of Clay Percentage at Abu Matamir Area for Envelope Need Deremination. cairo: drainage research institute, 2003.

Παραπομπή σε μορφή MLA (9th εκδ.)

abdel hady, ahmed m., et al. An Investigation of Clay Percentage at Abu Matamir Area for Envelope Need Deremination. drainage research institute, 2003.