Rahul, Ram
Vikas, 1982
Buku Teks
Chudal, Alaka Atreya, author
Oxford University Press, 2016
eBooks
Fajar Niky Wijayanti, author
2014
UI - Skripsi (Membership)
Mayberry, Grant E., author
American Management Association, 1993
eBooks
Alexandra Widyanareswari, author
Fakultas Teknik Universitas Indonesia, 2010
UI - Skripsi (Open)