Bibliografi : hlm. 326-347
Bibliografi : hlm. 233 - 224
No Inv.: 134162/PSM/Perp/13/1c
No Inv.: 3407-3413/P/Perp/92/7c~981-983/P/Perp/92/3c
No Inv.: 09-10/R/Perp/89/2c
No Inv.: 1719-1720/P/Perp/92/2c
No Inv.: 671/S/Perp/92/1c
Judul asli : "The Spirit of the Laws"
Judul asli : "Plumbing"