Total data: 13
Easy toefl = test of english a foreign language: tes toefl, skor di atas 500
Riyanto, Slamet;Yogyakarta : Pustaka Pelajar , 2011
TOEFL preparation : pasti capai skor tinggi > 500
Riyanto, Slamet; Handhini, Anna Christina;Yogyakarta : Andi , 2016
