Mahdalena, et al. “PENGARUH PUPUK ORGANIK CAIR GAMAL DAN UREA TERHADAP PERTUMBUHAN VEGETATIF BIBIT KAKAO (Theobroma Cacao. L): EFFECT OF LIQUID ORGANIC FERTILIZER GAMAL AND UREA ON VEGETATIVE GROWTH OF COCOA SEEDS (Theobroma Cacao. L)”. Agrifarm: Jurnal Ilmu Pertanian, vol. 10, no. 2, Dec. 2021, pp. 134-7, doi:10.24903/ajip.v10i2.1084.