MD. FAUZI AHMAD @ MOHAMAD. BASIC STATISTICAL ANALYSIS: STEP BY STEP USING SPSS. [s.l.] : Penerbit UTHM,2016. Disponível em: https://monograph.uthm.edu.my/index.php/penerbituthm/catalog/book/169. Acesso em: 26 aug. 2026.