Barnard, R.H.
Pearson-Prentice-Hall, 2004
Buku Teks SO
Tinton Ardi Saputro
Universitas Indonesia, 2015
UI - Tesis Membership
Nora, Leung
Studio Publication, 1990
Buku Teks SO
Mckee, Alexander
Grana , 1981
Buku Teks
Tewari, Ashish
Springer Nature, 2019
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