Mirza Annisa Izati
Fakultas Psikologi Universitas Indonesia, 2013
UI - Skripsi (Membership)
Butler, Timothy
Serambi Ilmu Semesta., 2007
Buku Teks
Zichy, Shoya
American Management Association, 2007
eBooks
Rowan, Sophie
Pearson, 2008
Buku Teks
Scott, Gini Graham
American Management Association, 2008
eBooks