Slamet, R.(2008).A quick and effective strategy to understand structure & written expression TOEFL test: kupas tuntas strategi cepat & efektif memahami soal structure & written expression (Cet.1).Yogyakarta:Kerjasama Pustaka Pelajar dan Academika.
Gaya MLA
Riyanto, Slamet."A quick and effective strategy to understand structure & written expression TOEFL test: kupas tuntas strategi cepat & efektif memahami soal structure & written expression".Cet.1Yogyakarta:Kerjasama Pustaka Pelajar dan Academika,2008.Textbook.