Diza Larentie, author
1990
UI - Skripsi (Membership)
Nugroho Tri Jatmiko, author
Universitas Indonesia, 2009
UI - Tesis (Open)
Albig, WIlliam
McGraw-Hill, 1939
Buku Teks
Lane, Robert E., author
Prentice-Hall, 1964
Buku Teks
Albig, WIlliam
McGraw-Hill, 1939
Buku Teks