Hanik, Nur Rokhimah, et al. “Response of Four O’clock Flowers (Mirabilis Jalapa L.) to the Short Length of Illumination (Photoperiodism)”. Jurnal Biologi Tropis, vol. 24, no. 3, Aug. 2024, pp. 586-91, doi:10.29303/jbt.v24i3.7283.