Riyanto, S. (2008). The 1'st Student's Choice TOEFL: Test Of English As A Foreign Language. Pustaka Pelajar.
Čikaški stil citiranja (17. izdanje)Riyanto, Slamet. The 1'st Student's Choice TOEFL: Test Of English As A Foreign Language. Pustaka Pelajar, 2008.
MLA način citiranja (8. izdanje)Riyanto, Slamet. The 1'st Student's Choice TOEFL: Test Of English As A Foreign Language. Pustaka Pelajar, 2008.
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