APA citiranje

Dida, N., Kassa, Y., Sirak, T., Zerga, E., & Dessalegn, T. (2014). Substance use and associated factors among preparatory school students in Bale Zone, Oromia Regional State, Southeast Ethiopia. BioMed Central.

Citação norma Chicago

Dida, Nagasa, Yibeltal Kassa, Teshome Sirak, Ephrem Zerga, and Tariku Dessalegn. Substance Use and Associated Factors Among Preparatory School Students in Bale Zone, Oromia Regional State, Southeast Ethiopia. BioMed Central, 2014.

MLA citiranje

Dida, Nagasa, et al. Substance Use and Associated Factors Among Preparatory School Students in Bale Zone, Oromia Regional State, Southeast Ethiopia. BioMed Central, 2014.