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Buku Teks
Wright, Paul H.
John Wiley & Sons, 1989
Buku Teks
Meyer, Michael D.
McGraw-Hill , 1984
Buku Teks
Miftah Rahmatullah
Universitas Indonesia, 2015
UI - Skripsi Membership
Hobbs, F.D.
Pergamon Press, 1974
Buku Teks