Julius, Janssen (2024) Laporan pengabdian kepada masyarakat pelatihan service excellent pada siswa siswi SMK Santa Maria Jakarta Pusat. Bachelor thesis, Universitas Pelita Harapan.

Innocentio, Geraldy Misael, Djaja, Matthew Armien and Julius, Janssen (2024) Laporan seminar hasil pengaruh food quality dan service quality terhadap customer satisfaction dan customer loyalty di Imperial Kitchen & Dimsum Mall Kelapa Gading. Diploma thesis, Universitas Pelita Harapan.

Djaja, Matthew Armien, Innocentio, Geraldy Misael and Julius, Janssen (2024) Pengaruh food quality dan service quality terhadap customer satisfaction dan customer loyalty di imperial kitchen & dimsum mall Kelapa Gading. Diploma thesis, Universitas Pelita Harapan.