Mancuso, Joseph
Simon & Schuster , 1993
Buku Teks
Butarbutar, Serirama
Universitas Indonesia, 2000
UI - Tesis (Membership)
Babb, Hugh W.
Harper and Row , 1969
Buku Teks
Mendelson, Martin
Pustaka Binawan Pressindo, 1997
Buku Referensi
Ballou, Ronald H.
Pearson Education : Prentice Hall, 2004
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