SUGIONO, L. (1993). A reference grammar for english course, beginners, SMA student, english teachers. Andi Offset.
Lua i Stíl Chicago (17ú heag.)SUGIONO, L.Gito. A Reference Grammar for English Course, Beginners, SMA Student, English Teachers. Yogyakarta: Andi Offset, 1993.
Lua MLA (9ú heag.)SUGIONO, L.Gito. A Reference Grammar for English Course, Beginners, SMA Student, English Teachers. Andi Offset, 1993.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.