http://repositori.kemdikbud.go.id/id/eprint/10636
http://repositori.kemdikbud.go.id/id/eprint/10637
http://repositori.kemdikbud.go.id/id/eprint/10642
http://repositori.kemdikbud.go.id/id/eprint/10645
http://repositori.kemdikbud.go.id/id/eprint/10655
http://repositori.kemdikbud.go.id/id/eprint/10626
http://repositori.kemdikbud.go.id/id/eprint/10623
http://repositori.kemdikbud.go.id/id/eprint/10618
ELT advanced
general.
http://repositori.kemdikbud.go.id/id/eprint/10655
http://repositori.kemdikbud.go.id/id/eprint/10660
http://repositori.kemdikbud.go.id/id/eprint/10718
http://repositori.kemdikbud.go.id/id/eprint/10721
http://repositori.kemdikbud.go.id/id/eprint/10742