No Inv.: 67346-67348/S/00/3c
Bibliografi : hlm. 345-346
Bibliografi : hlm. 122-126No Inv.: 147128,147129/P/Perp/15/2c
Judul asli :"Economics"
No Inv.: 129874/SM/Perp/11/1c
No Inv.: 128205/SM/Perp/10/1c
Bibliografi : hlm. 295-297No Inv.: 144610/S/Perp/15/1c
Bibliografi : hlm. 255-259No Inv.: 135903/S/Perp/14/1c