by H. PROF. DR. AFIF MUHAMMAD, M.A. $20.00
by Fakultas Psikologi Untar $6.00
by Wahyuni Mulyawati & Ilse Harahap $6.00
by Gary Schuman dan Clara Joewono $5.00
by Ir. Sugiarto, dkk $13.00
by Atmajaya $6.00