Kopp, Hermann
From the molecular world : a nineteenth-century science fantasy
Springer, 2012
 eBooks
Kitto, H.D.F.
The Greeks
Penguin Books, 1951
 Buku Teks SO
Cairns, John C.
The nineteenth century 1815-1914
Free Press, 1965
 Buku Teks
Gooch, G.P.
History and historians in the nineteenth century
Beacon Press, 1968
 Buku Teks SO
British authors of the nineteenth century
edited by Stanley J. Kunitz, Howard Haycraft
Wilson, 1936
 Buku Referensi