توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

(93732), W. E. A., (3494279), A. S., & (152560), S. S. (2020). Prevalence and Socio-Demographic, Academic, Health and Lifestyle Predictors of Illicit Drug/s Use among University Undergraduate Students in Finland.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

(93732), Walid El Ansari, Abdul Salam (3494279), و Sakari Suominen (152560). Prevalence and Socio-Demographic, Academic, Health and Lifestyle Predictors of Illicit Drug/s Use Among University Undergraduate Students in Finland. 2020.

توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)

(93732), Walid El Ansari, et al. Prevalence and Socio-Demographic, Academic, Health and Lifestyle Predictors of Illicit Drug/s Use Among University Undergraduate Students in Finland. 2020.