Buku latihan soal mantappu jiwa / Jerome Polin Sijabat; penyunting, Ruth Priscilia Angelina; ilustrator, Isa Indra Permana - Jerome Polin Sijabat ; Ruth Priscilia Angelina (penyunting) ; Isa Indra Permana (ilustrator) (Gramedia Pustaka Utama, 2021)