RESENSI BUKU http://www.slideshare.net/buwarnisutopo/resensi-8330874
SURAT DINAS
GENERALISASI, ANALOGI, SEBAB AKIBAT http://www.slideshare.net/buwarnisutopo/3-generalisasi-analogi-sebab-akibat-8341456
SILOGISME http://www.slideshare.net/buwarnisutopo/resensi-8330874