Anjarsari, Intan Ratna Dewi, et al. “Effect of Plant Growth Regulator on Growth, Yield and Catechin Content of Tea (Camellia Sinensis (L.) O.Kuntze)”. International Journal on Advanced Science, Engineering and Information Technology, vol. 12, no. 1, Jan. 2022, pp. 403-10, doi:10.18517/ijaseit.12.1.11657.