Strategic Direction Publishers, [date of publication not identified]
Buku Referensi
Strategic Direction Publishers, [date of publication not identified]
Buku Referensi
Summers, Donna C. S., author
Pearson/Prentice Hall, 2005
Buku Teks
Manalu, Dame Reiny Elvrida, author
[Fakultas Ekonomi dan Bisnis Universitas Indonesia;Fakultas Ekonomi dan Bisnis Universitas Indonesia, Fakultas Ekonomi dan Bisnis Universitas Indonesia], 2014
UI - Tesis (Membership)
Pasaribu, Hiras, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2009
Artikel Jurnal