Bibliografi : hlm. 147 - 148
No Inv.: 4108/P/Perp/11/1c
No Inv.: 143439-143441/P/Perp/14/3c
Bibliografi : hlm. 223-231
Bibliografi : hlm. 300-308
No Inv.: 3554-3558/P/Perp/92/5c
No Inv.: 179/S/Perp/95/1c
No Inv.: 14252-14256/P/Perp/94/5c~3251-3255/P/Perp/95/5c
Judul asli : "The Indonesian Vowels : Accoustic and Perceptual Explorations"