Sembiring, Sarah Deasyca
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2018
UI - Skripsi (Membership)
Carlton, Katherine Tasheff
Gloucester, Ma Rockport Publisher 2001,
Buku Referensi
Dea Indriyani
Fakultas Teknik Universitas Indonesia, 2016
UI - Skripsi (Membership)
Muhammad Hafidz Syauqi
Fakultas Teknik Universitas Indonesia, 2022
UI - Tesis (Membership)
Candra Ahmadi
Andi, 2013
Buku Teks