by Alex I. Suwandi, Pr $7.00
by Prof. K. Ali $6.00
by Dr. K.H. Didin Hafidhuddin, M.Sc $9.00
by Warisno $7.00
by Dr. Ir. Muhammad Rasyaf, MS $6.00
by Prof. Dr. A. Syafii Ma'arif $7.00
by Ackley, Gardner $13.00
by Khalid Muhammad Khalid $9.00
by F. A. Suwandi Wihardjo, B. Sc $6.00
by Agung Kristiawan $9.00
by Jan Takasihaeng $7.00
by Muhammad ash-Shayim $5.00