Purwanti E. PENINGKATAN KETERAMPILAN DASAR MENGAJAR MELALUI OPTIMALISASI RAGAM UMPAN BALIK. JLITBANG [Internet]. 2009Jun.1 [cited 2026May13];7(1):15-3. Available from: https://ejournal.jatengprov.go.id/index.php/jurnaljateng/article/view/207