Wels, Byron
Computer circuits & how they work
Tab Books , 1970
Buku Teks
Parker, Steve
How things work
Parragon, 2000
Buku Referensi
Fahnestock, James D.
Computers and how they work
Ziff Publishing, 1959
Buku Teks SO
Westcott, Charles G.
Tape recorders; how they work
Howard W. Sams, 1964
Buku Teks
Dobson, Ann
How to Communicate at work
grolier international, 1999
Buku Teks