D. Sugandika and P. Nahariani, “PENGARUH SENAM ERGONOMIS TERHADAP GANGGUAN TIDUR (INSOMNIA) PADA LANSIA DI PANTI WERDHA MOJOPAHIT MOJOKERTO: Effect Of Gymnastics Ergonomic Sleep Disorders (Insomnia) Elderly In Elderly Elderly Mojopahit Mojokerto”, Jikep, vol. 2, no. 1, pp. 43-50, Mar. 2016.