Esmael Ahmed, Tsegay Girmay, & Longdom Publishing. Psychoactive Substances Use (Khat, Alcohol and Tobacco) and Associated Factors among Debre Markos University Students, North-West Ethiopia, 2013.
Παραπομπή σε μορφή Chicago (17η εκδ.)Esmael Ahmed, Tsegay Girmay, και Longdom Publishing. Psychoactive Substances Use (Khat, Alcohol and Tobacco) and Associated Factors Among Debre Markos University Students, North-West Ethiopia, 2013.
Παραπομπή σε μορφή MLA (9th εκδ.)Esmael Ahmed, et al. Psychoactive Substances Use (Khat, Alcohol and Tobacco) and Associated Factors Among Debre Markos University Students, North-West Ethiopia, 2013.
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