KARTIKA DWI JAYANTI; ADHONA BHAJANA WIJAYA NEGARA. ANALISIS KELAYAKAN USAHA PETERNAKAN SAPI DI SAPI PERKASA FARM KECAMATAN HAMPARAN PERAK KABUPATEN DELI SERDANG. Journal of Innovation Research and Knowledge, [S. l.], v. 5, n. 3, p. 3801–3814, 2025. DOI: 10.53625/jirk.v5i3.11027. Disponível em: https://mail.bajangjournal.com/index.php/JIRK/article/view/11027. Acesso em: 27 oct. 2025.