Toefl test: a quick and effective strategy to understand structure and writtrn expression (kupas tuntas strategi cepat dan efektif memahami soal structure dan written expression
A concise introduction to English morphology and syntax
English from Radio Australia : Bahasa Inggris lewat radio Australia
Contemporary English : Indonesia dictionary
English by pharases
Ujian dan pembahasab TOEFL : structure and written expression