1.
Peran Sjafruddin Prawiranegara dalam Mempertahankan Kedaulatan Nkri dari Agresi Militer Belanda II di Riau, Tahun 1948-1949
2.
Study of the Potential and Development of Riam Sabada Natural Tourism Attractions in Sebatih Village Sengah Temila District Landak Regency West Kalimantan Province