R. Purwani and D. Mustikasari, “Pengembangan Buku Pengayaan Menulis Karangan Naratif yang Berwawasan Kesantunan bagi Peserta Didik Kelas VII SMP: Development of Enrichment Books Writing Narrative Essays with Politeness Insights for Grade VII Junior High School Students”, JB, vol. 3, no. 1, p. 53-68, Jun. 2022.