Bibliografi : hlm. 101-102 No Inv.: 136525/SM/Perp/13/1c
Bibliografi : hlm. 285-294
No Inv.: 76970-76979/S/01/10c
No Inv.: 84549/P/Perp/FMIPA/03/1c
Bibliografi : hlm. 297-301
Judul asli :"Signals and system"
No Inv.: 120617/SM/Perp/09/1c
Judul asli : "Modern Control Engineering"