The Europe year book 1970 : volume II
Europa Publications Limited, 1970
 Buku Referensi
Kumpulan pajak Sinar Harapan 1979
Yayasan Bina Pajak, 1980
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Economic and social survey of Asia and the Pacific 1992 part one recent Economic and Social Developments
United Nations , 1993
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World, Bank, author
Proceedings of the world bank annual conference on development economics 1994
The International Bank for Reconstruction and Development, 1995,
 Buku Referensi
Asia and Pacific annual review
edited by Kevin Rafferty
World of Information, 1980
 Buku Teks
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