No Inv.: 104190-104194/P/Perp/06/5c~119137-119139/P/Perp/09/3c
No Inv.: 1595/S/Perp/96/1c
Judul asli : "The Economics of Production"
No Inv.: 8944-8953/P/Perp/97/10c
No Inv.: 75988-75989/P/01/2c
Bibliografi : hlm. 270-274 No Inv.: 141793-141797/P/Perp/14/5c