Rokeach, Milton
Jossey-Bass Publishers, 1972
Buku Teks
Liska Dharma Kusuma, author
2016
UI - Skripsi (Membership)
Torres-Coronas, Teresa, author
Idea Group Publishing, 2005
Buku Teks
Baird, Lloyd S., author
Business One Irwin, 1992
Buku Referensi
Gunawan Tjahjono, author
Fakultas Teknik Universitas Indonesia, 2000
UI - Laporan Penelitian