SalatnayaH., WidodoW. D., Winarno, and FuahA. M. “The Influence of Environmental Factors on the Activity and Propolis Production of Tetragonula Laeviceps”. Jurnal Ilmu Produksi Dan Teknologi Hasil Peternakan, Vol. 8, no. 2, June 2020, pp. 67-71, doi:10.29244/jipthp.8.2.67-71.