Calender reform
New York Ministry of Information and Broadcasting 1957
 Buku Teks
Harald Kinateder, author
Revisitiing calender anomalies in brics countries
Bank Indonesia Insitute, 2019
 Artikel Jurnal
Report for the calender year 1962 and 1963 Population Council
New York, N.Y. 1963,
 Buku Teks
Land reform
World Bank, 1974
 Buku Teks
Hosen, Nadirsyah, author
Shari'a & constitutional reform in Indonesia
Institute of Southeast Asian Studies, 2007
 Buku Teks
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