Darna, V.(2006).Cara mudah menguasai Toefl: Paper based tes. computer based test. problem solving. trik dan strategi. menghitung skor .JAKARTA:Puspa Swara.
Gaya MLA
Darna, Vincent."Cara mudah menguasai Toefl: Paper based tes. computer based test. problem solving. trik dan strategi. menghitung skor".JAKARTA:Puspa Swara,2006.Text.