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Buku Referensi
Herbert, Mimi
The Lontar Foundation , 2002
Buku Referensi
Rahmadi Fajar Himawan
2019
UI - Skripsi (Membership)
Wilson, Edwin L.
McGraw-Hill, 1988
Buku Teks
Wilson, Edwin L.
McGraw-Hill, 1988
Buku Teks