Williams, Neville
Chronology of the Modern World, 1763-1965
Penguin Books, 1975
 Buku Teks
Williams, Neville
Chronology of the expanding world 1492 to 1762
Simon & Schuster, 1994
 Buku Referensi
Storey, R.L.
Chronology of the medieval world 800 to 1491
Simon & Schuster , 1994
 Buku Referensi
Mellersh, H.E.L.
Chronology of the ancient world 10,000 B.C. to A.D. 799
Simon & Schuster, 1994
 Buku Referensi
World tables 1992
Johns Hopkins University Press, 1992
 Buku Referensi