Cita APA (7a ed.)

Abdelaal, A. S., Elhadidy, S. S., & Ibrahim, M. A. (2021). Comparative Study between Vitamin D and Placebo in Patients with Nasal Polyps. Al-Azhar University, Faculty of Medicine (Damietta).

Cita Chicago Style (17a ed.)

Abdelaal, Ahmed Sobhi, Salah Saleh Elhadidy, y Mohamed Abd-Elkafy Ibrahim. Comparative Study Between Vitamin D and Placebo in Patients with Nasal Polyps. Al-Azhar University, Faculty of Medicine (Damietta), 2021.

Cita MLA (8a ed.)

Abdelaal, Ahmed Sobhi, et al. Comparative Study Between Vitamin D and Placebo in Patients with Nasal Polyps. Al-Azhar University, Faculty of Medicine (Damietta), 2021.