Stuart Flack (McKinsey & Company), 2001
Majalah, Jurnal, Buletin
Cambridge University Press,
Majalah, Jurnal, Buletin
Yayasan Proklamasi,
Majalah, Jurnal, Buletin
rakesh kumar,
Majalah, Jurnal, Buletin
University Of Pennsylvania Press,
Majalah, Jurnal, Buletin