Assalamah, Tuhfatul Mubarokah. “The Influence of Brand Ambassador Iqbaal Ramadhan on Parental Decisions in the Digital Community of East Java Smart Parents in Choosing Ruangguru As a Children’s Online Tutoring Media”. The Commercium, vol. 3, no. 2, Sept. 2020, pp. 1-5, doi:10.26740/tc.v3i2.36275.