Dewi Safitri, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2012
UI - Tesis (Membership)
Artikel Jurnal
Orford, Jim, author
John Wiley & Sons, 1992
Buku Teks
Fawzan Yahya Patria, author
Fakultas Psikologi Universitas Indonesia, 2012
UI - Skripsi (Open)
Nelson, Geoffrey, author
Palgrave, 2005
Buku Teks