Potter, Andrew, author
Harper Perennial, 2011
Buku Teks
Lindholm, Charles, author
Blackwell Publishing, 2008
Buku Teks
Grace Oktaviana, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2017
UI - Skripsi (Membership)
Ferrara, Alessandro
Routledge, 1998
Buku Teks
Baby Ahnan, author
Universitas Indonesia, 2005
UI - Disertasi (Membership)