Judul asli : "Environmental Accustics"
Bibliografi : hlm. 307-309 No Inv.: 3209-3213/P/99/5c
No Inv.: 110113/S/Perp/07/1c
No Inv.: 3464-3473/P/Perp/97/10c
No Inv.: 88986-88993,89060-89603/P/Perp/04/12c
No Inv.: 2828-2829/BD/Perp/87/2c~130245/PH/Perp/11/1c
No Inv.: 119149-119151/P/Perp/09/3c
No Inv.: 8099-8108/P/Perp/97/10c~3308-3312/P/Perp/98/5c
No Inv.: 500/PS2PT/Perp/95/1c~139580-139581/P/Perp/14/2c
No Inv.: 1408-1410/S/Perp/91/3c