[publisher not identified], [date of publication not identified]
Naskah
[publisher not identified], [date of publication not identified]
Naskah
Bogor APEC 1994,
Buku Teks
Gerungan, W.A., author
Eresco, 1988
Buku Teks
Wal, G. van der, author
Erlangga, 1985
Buku Teks