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