ITM Business School, 2008
Majalah, Jurnal, Buletin
Ratih Dwi Suciani, author
Universitas Indonesia, 2010
UI - Tesis (Open)
Artikel Jurnal
Griffin, Ricky W., author
Pearson Education International, 2006
Buku Teks
Septialina Dwi Haryanti, author
2010
UI - Skripsi (Open)