Bibliografi : hlm. 157-158 No Inv.: 134750/SM/Perp/13/1c
Bibliografi : hlm. 199-201 No Inv.: 136199/SM/Perp/13/1c
No Inv.: 141508-141512/P/Perp/14/5c
No Inv.: 100723-100725/P/Perp/05/3c
No Inv.: 2480/S/Perp/87/1c
No Inv.: 89579-89580/PSM/Perp/04/2c
Judul asli :"Control Your Overheads"
No Inv.: 14483-14485/P/Perp/94/3c
No Inv.: 85074-85078/P/Perp/FIS/03/5c
No Inv.: 14134-14137/P/Perp/94/4c~14356/P/Perp/94/1c