Gaya APA

Riyanto, S. (2008). A quick and effective strategy to prepare the TOEFL test: kupas tuntas strategi cepat dan efektif persiapan paper-based TOEFL . Yogyakarta: Pustaka Pelajar.

Gaya MLA

Riyanto, Slamet. "A quick and effective strategy to prepare the TOEFL test: kupas tuntas strategi cepat dan efektif persiapan paper-based TOEFL". Yogyakarta: Pustaka Pelajar, 2008. Text.