FreeHand 8 : an introduction to digital illustration
Prentice-Hall, 1998
 Buku Teks
Evans, G. R. (Gillian Rosemary)
Academics and the real world
Open University Press, 2002
 Buku Teks
Alexander, Roy, 1925-
Real-world time management
American Management Association;, 2009
 eBooks
Sargent III, Murray
Interfacing microcomputers to the real world
Addison-Wesley, 1981
 Buku Teks SO
The World book encyclopedia : volume 8
World Book, 1985
 Buku Referensi