muhammad, firdaus (2015) “Self Sufficiency Outlook of Indonesia Soybean on the Era of Trade Liberalization”. Sekolah Tinggi Ilmu Ekonomi Mandala. (Unpublished)

muhammad firdaus, firdaus (2015) “Kajian Teoritis Dampak Liberalisasi Perdagangan terhadap Kinerja Ekonomi Jagung di Indonesia”. Documentation. Sekolah Tinggi Ilmu Ekonomi Mandala. (Unpublished)