SUGIONO, L. (1993). A reference grammar for english course, beginners, SMA student, english teachers. Andi Offset.
Čikaški stil citiranja (17. izdanje)SUGIONO, L.Gito. A Reference Grammar for English Course, Beginners, SMA Student, English Teachers. Yogyakarta: Andi Offset, 1993.
MLA način citiranja (9. izdanje)SUGIONO, L.Gito. A Reference Grammar for English Course, Beginners, SMA Student, English Teachers. Andi Offset, 1993.
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