Sinaga, Martha, author
Gramedia, 2006
Buku Teks
Thomas Wijasa Bratawidjaja, author
Pustaka Binaman Pressindo , 1996
Buku Teks
Thomas Wijasa Bratawidjaja, author
Pustaka Binaman Presindo , 1994
Buku Teks
Griffin, Ricky W., author
Erlangga, 2007
Buku Teks
Nainggolan, Suwondo, author
[, ], 2006
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