Fifty years of Indian parliament
edited by G.C. Malhotra
Lok Sabha Secretariiat, 2002.
 Buku Teks SO
Hazeu, H.A.G.
Fifty years of electronic components 1921-1971
N.V. Philips Gloeilampenfabrieken, 1971
 Buku Teks
Scott-James, R.A.
Fifty years of English literature 1900-1950
Longman, 1951
 Buku Teks SO
Mohamad, Gunawan
Celebrating Indonesia : fifty years with the Ford Foundation, 1953-2003.
MSPI (Masyarakat Seni Pertunj. Indonesia), 2003
 Multimedia
Celebrating indonesia : fifty years with the ford foundation 1953-2003
Ford foundation , 2003
 Buku Referensi