Stone, Merlin, author
Crest, 2001
Buku Teks
Naufalia, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2015
UI - Skripsi (Membership)
Bayu Auguste Bartholdi, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2012
UI - Skripsi Open
Linoff, Gordon S., author
Wiley publishing, 2011
Buku Teks
Maria Tries, author
2001
UI - Tesis (Membership)