Kaplan, Robert S.
Erlangga, 2000
Buku Teks
by Thomas B. Glans [and others]
Holt, Rinehart and Winston, 1968
Buku Teks
Rahmasari Nung Yulianti
2014
UI - Tesis (Membership)
Harper & Row, 1975
Buku Teks
Sondeno, Stanley R.
Business Publications, 1985
Buku Teks