Riyanto, S. (2007). The 1st Student's Choice Toefl Preparation: Test Of English As A Foreign Language/ Slamet Riyanto. Yogyakarta:4b Pustaka Pelajar.
Παραπομπή σε μορφή Chicago (17η εκδ.)Riyanto, Slamet. The 1st Student's Choice Toefl Preparation: Test Of English As A Foreign Language/ Slamet Riyanto. Yogyakarta:4b Pustaka Pelajar, 2007.
Παραπομπή σε μορφή MLA (8th εκδ.)Riyanto, Slamet. The 1st Student's Choice Toefl Preparation: Test Of English As A Foreign Language/ Slamet Riyanto. Yogyakarta:4b Pustaka Pelajar, 2007.
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