Johns, Dean.
Strategic Information and Research Development Centre, 2011
Buku Teks
Johns, Dean.
Strategic Information and Research Development Centre , 2009
Buku Teks
Buku Teks
edited by R. Narayanan
Applied Science, c1983
Buku Teks
Edey, Maitland A. (Amstrong), 1910-
Time-Life International, 1973
Buku Teks