Sari, Yolanda Mayang, et al. “The Effect of Trustworthiness, Attractiveness, Expertise, and Popularity of Celebrity Endorsement”. Jurnal Manajemen Dan Kewirausahaan, vol. 9, no. 2, Dec. 2021, pp. 163-72, doi:10.26905/jmdk.v9i2.6217.