Sabrina, Mutia Zakiyyatus, et al. “Response of Eight O’clock Flowers (Turnera Subulata) to the Short Length of Illumination (Photoperiodism)”. Jurnal Biologi Tropis, vol. 25, no. 1, Mar. 2025, pp. 1051-8, doi:10.29303/jbt.v25i1.8316.