A. Rochmaniah and E. Fajarini, “Customer Service in Influencing Perceptions of New Students and Services of Upt PMB University of Muhammadiyah Sidoarjo : Customer Service Dalam Mempengaruhi Persepsi Mahasiswa Baru dan Pelayanan Upt PMB Universitas Muhammadiyah Sidoarjo”, Kanal, vol. 9, no. 1, pp. 33–37, Sep. 2020.