Lemma, S., Berhane, Y., Worku, A., Gelaye, B., & Williams, M. A. (2013). Good Quality Sleep is Associated with Better Academic Performance among University Students in Ethiopia.

Lemma, Seblewengel, Yemane Berhane, Alemayehu Worku, Bizu Gelaye, و Michelle A. Williams. Good Quality Sleep Is Associated With Better Academic Performance Among University Students in Ethiopia. 2013.

Lemma, Seblewengel, et al. Good Quality Sleep Is Associated With Better Academic Performance Among University Students in Ethiopia. 2013.