Tuhuteru, Sumiyati, et al. “Application of Pig Manure and NPK 16-16-16 Fertilizer on Germination and Yield of Pakcoy (Brassica Chinensis L.)”. Buletin Poltanesa, vol. 24, no. 2, Dec. 2023, pp. 134-41, doi:10.51967/tanesa.v24i2.2637.