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The Concepts of Population and Sampling in Quantitative Research and the Selection of Participants/Key Informants in Qualitative Research. Al Hikmah Indonesian Journal of Early Childhood Islamic Education, [S. l.], v. 9, n. 2, p. 359–373, 2025. DOI: 10.35896/ijecie.v9i2.910. Disponível em: https://www.ojs.mlati.id.or.id/index.php/ijecie/article/view/910. Acesso em: 6 sep. 2026.