2009
Majalah, Jurnal, Buletin
Le Brefon, Preston P.
Holt, Rinehart and Winston, 1965
Buku Teks
Andi Nur`aida Angriyani, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2005
UI - Tesis (Membership)
Le Breton, Preston P.
Prentice-Hall, 1961
Buku Teks
Le Breton, Preston P.
Englewood Cliffs, 1961
Buku Teks