N. K. Komsin and N. Isnaini, “ PENGARUH CROSSWORD PUZZLE THERAPY (CPT) TERHADAP FUNGSI KOGNITIF LANSIA DI PANTI PELAYANAN SOSIAL LANJUT USIA (PPSLU) SUDAGARAN BANYUMAS”, JKS, vol. 7, no. 2, pp. 6–15, Jul. 2020.