Edwards, Clive, author
Page One, 2009
Buku Referensi
Lomax, James
Longmans, Green , 1956
Buku Teks
Didik Setiawan, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2013
UI - Tesis (Membership)
Rosita Nur Ayuni, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2015
UI - Tesis (Membership)
Clairmonte, Frederick, author
Zed Press, 1983
Buku Teks