?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.au=Afrianti%2C+Afrianti&rft.aufirst=Afrianti&rft.aulast=Afrianti&rft.date=2010&rft.title=Persepsi+Siswa+tentang+Kesulitan+Guru+Ekonomi+Mengajar+IPS+Terpadu+dan+Kompetensi+Profesional+Guru+Terhadap+Hasil+Belajar+Siswa+di+SLTPN+20+Padang&rft.inst=Universitas+Negeri+Padang&rft.degree=Bachelor%2FSkripsi