by Dr. Sofyan Syafri Harahap, M.S,Ac $7.00
by Adiwarman Karim $31.00
by Prof. Drs. H. Lili M. Sadeli, M.Pd & Drs. H. Bedjo Siswanto, M.Si $9.00
by MarkPlus & Co $28.00
by Health Media Nutrition Series $6.00
by Pandji Anoraga, S.E., M.M $13.00