Wells, K., & Littell, J. H. Study quality assessment in systematic reviews of research on intervention effects.
Chicago Style aipamenaWells, Kathleen., và Julia H. Littell. Study Quality Assessment in Systematic Reviews of Research On Intervention Effects.
MLA aipamenaWells, Kathleen., và Julia H. Littell. Study Quality Assessment in Systematic Reviews of Research On Intervention Effects.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.