Παραπομπή APA

El-Sherbiny, N. A., Masoud, M., Shalaby, N. M., & Shehata, H. S. (2015). Prevalence of primary headache disorders in Fayoum Governorate, Egypt. J Headache Pain.

Παραπομπή Chicago Style

El-Sherbiny, Naglaa A., Mohamed Masoud, Nevin M. Shalaby, και Hatem S. Shehata. "Prevalence of Primary Headache Disorders in Fayoum Governorate, Egypt." J Headache Pain 2015.

Παραπομπή MLA

El-Sherbiny, Naglaa A., Mohamed Masoud, Nevin M. Shalaby, και Hatem S. Shehata. "Prevalence of Primary Headache Disorders in Fayoum Governorate, Egypt." J Headache Pain 2015.

Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.