by Richard G. Lipsey., dkk $16.00
by Drs. Husein Umar, S.E., M.M., MBA $9.00
by Adler Haymans Manurung $7.00
by Drs. A.W. Widjaja $9.00
by Hal Hill $12.00
by Kemas Ali Hanfiah $12.00