Amirrudin, M., Nasution, K. and Supahar, S. 2020. Effect of Variability on Cronbach Alpha Reliability in Research Practice. Jurnal Matematika, Statistika dan Komputasi. 17, 2 (Dec. 2020), 223-230. DOI:https://doi.org/10.20956/jmsk.v17i2.11655.