Ninda Rachmawati. “Ecofarming (Desa Sumbertangkil Kecamatan Tirtoyudo, Kabupaten Malang, Provinsi Jawa Timur.)”. JOURNAL INNOVATION AND COMMUNITY SERVICE 1, no. 02 (September 1, 2021): 54–67. Diakses September 7, 2025. https://journal.stiekop.ac.id/index.php/ICS/article/view/171.