Arindri, R. F. (2014). English Grammar and Tenses for Beginners. Penerbit Andi.
Lua i Stíl Chicago (17ú heag.)Arindri, Regina Fletianti. English Grammar and Tenses for Beginners. Penerbit Andi, 2014.
Lua MLA (8ú heag.)Arindri, Regina Fletianti. English Grammar and Tenses for Beginners. Penerbit Andi, 2014.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.