by Moenaf H. Regar $7.00
by Ir. Doli Siregar, M.Sc., FRICS., SVC $11.00
by Prof. Dr. J. Winardi, SE $9.00
by Husein Umar $11.00
by - $11.00
by Adiwarman Karim $12.00
by M. Shidiq $9.00
by Slameto $9.00
by Dr. Sofyan Syafri Harahap, M.S,Ac $11.00
by Qodi Iyad Al Yahsubi $13.00
by Said Hawwa $16.00
by $6.00