Bibliografi : hlm. 233-237
No Inv.: 136231-136233/SM/Perp/1`3/3c
No Inv.: 132610-132612/S/Perp/12/3c
Judul asli : Al-Khusyu fish-Shalah fi Dhau'il Kitab was-Sunnah
No Inv.: 46-50/P/Perp/96/5c
Judul Asli : "Modern Control Systems"
No Inv.: 73914-73928/S/00/10c
No Inv.: 75146/S/01/1c
No Inv.: 78744/01/1c