English everywhere / Erna Fitrini, Ratih Sumiratingratri; editor, Didik Djunaedi I love reading : Level 2 yummy / Erna Fitriani, Ratih Sumiratingratri ; editor, Didik Djunaedi; ilustrator, Tim Artistik CPR 10 sahabat Rasulullah / Tim Gema Insani ; penyunting bahasa, Ratih Cahaya ; ilustrasi, Erna Rumbiati English is fun / Erna Fitrini, Ratih Sumiratingratri; editor, Didik Djunaedi I love reading : level 4 School events / Erna Fitrini, Ratih Sumiratingratri; editor, Didik Djunaedi; ilustrator, Tim Artistik CPR I Love Reading : level 3 I can't believe / Erna Fitrini, Ratih Sumiratingratri; editor, Didik Djunaedi; ilustrator, Tim Artistik CPRI love reading : level 4 Let's Preapare / Erna Fitrini, Ratih Sumiratingratri; editor, Didik Djunaedi; ilustrator, Tim Artistik CPRI love reading : level 4 The Outer Space / Erna Fitrini, Ratih Sumiratingratri; editor, Didik Djunaedi; ilustrator, Tim Artistik CPRI love reading : level 4 Bukittinggi, Here we come / Erna Fitrini, Ratih Sumiratingratri; editor, Didik Djunaedi; ilustrator, Tim Artistik CPRSpeaking english at home and school / Erna Fitrini, Ratih Sumiratingratri ; editor, Didik Djunaedi; ilustrator, Tim Artistik CPR