Nur Awaliyah Suci, et al. “The Effect of Consumer Friendship and Completeness of Building Material Products on the Decision of Buying In-Terest in the Prima Baja Aek Tapa Rantauprapat Building Materials Store”. International Journal of Economics and Management Research, vol. 4, no. 2, May 2025, pp. 212-23, doi:10.55606/ijemr.v4i2.371.