Iswanto, M. and Abror, M. (2022) “The Effect Of Planting Distance and Dosage Of Fertilizing Cow Manage On Production Products Red Rosella (Hibiscus sabdariffa L.): Pengaruh Jarak Tanam dan Dosis Pemberian Pupuk Kandang Sapi Terhadap Hasil Produksi Rosela Merah (Hibiscus sabdariffa L.)”, Procedia of Engineering and Life Science, 2(2). doi: 10.21070/pels.v2i2.1267.