Muchlis, Dilalatul Urfiah. “GAP Analysis Model Servqual Program Pemberian Permakanan Lansia Di Kota Surabaya”. Media Gizi Kesmas 11, no. 2 (November 23, 2022): 528–536. Accessed December 1, 2024. https://e-journal.unair.ac.id/MGK/article/view/33755.