Sukmawati, S., S. Salmia, and S. Sudarmin. “Population, Sample (Quantitative) and Selection of Participants/Key Informants (Qualitative)”. Edumaspul: Jurnal Pendidikan, Vol. 7, no. 1, Mar. 2023, pp. 131-40, https://ummaspul.e-journal.id/maspuljr/article/view/5259.