Wimar Witoelar, author
No regrets : reflection of a presidential spokesman
Equinox Publishing (Asia) PTE, 2002
 Buku Teks
Neustadt, Richard E., author
Presidential power : the politics of leadership
John Wiley & Sons, 1961
 Buku Teks
Presidential elections and 'migratory' lawmakers
 Artikel Jurnal
The Presidential election an dtransition 1960-1961
edited by Paul T. David
Brookings Institution, 1961
 Buku Teks
International catalogue of Occupational safety and health films
International Labour Office, 1969
 Buku Teks
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