Godfrey, Martin, author
St. Martin's Press, 1985
Buku Teks
Dian Puspitasari, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2013
UI - Skripsi (Membership)
Choudhury, Masudul Alam, 1948-, author
Routledge, 2017
eBooks
Nafi Ghaniy, author
2016
UI - Skripsi (Membership)
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 1991
UI - Skripsi (Membership)