HIDAYATI, R. ANALISIS EFISIENSI TEKNIS USAHATANI KUBIS DI KABUPATEN AGAM, SUMATERA BARAT. Jurnal Hexagro, [S. l.], v. 2, n. 1, 2018. DOI: 10.36423/hexagro.v2i1.114. Disponível em: https://e-journal.unper.ac.id/index.php/hexagro/article/view/114. Acesso em: 28 jan. 2023.