Ferguson, John Alexander
Bibliography of Australia; Volume IV
National Library of Australia, 1977
 Buku Referensi
The encyclopedia of democracy : volume IV
editor in chief, Seymour Martin Lipset
Routledge, 1995
 Buku Referensi
Language and linguistics : volume IV
selected and introduced by Roy Harris
Routledge/Thoemmes Press, 1995
 Buku Referensi
The Columbia encyclopedia; Volume IV
edited by William Bridgwater dan Seymour Kurtz
Columbia University Press, 1963
 Buku Referensi
Toynbee, Arnold J.
A study of history; Volume IV
Oxford University Press, 1956
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