Clark D. Moore and Ann Dunbar
Africa yesterday and today
Praeger Publishers, 1968
 Buku Teks SO
Residential mobility and public policy / Edited by W.A.V. Clark and Eric G. Moore
Sage Publications, 1980
 Buku Teks SO
Ahuja, B. N.
Communications yesterday, today and tomorrow
Surjeet Publications, 1989
 Buku Teks SO
Kampung boy: yesterday & today
Berita Publishing Sdn Bhd, 1993
 Buku Referensi
Africa today
edited by C. Grove Haines
John Hopkins Press, 1956
 Buku Teks SO