Gaya APA
Riyanto, S. (2015).
The 1 Student's Choiche Toefl :Test Strategy for Structure and Written Expression .
Yogyakarta:
Pustaka Pelajar.
Gaya MLA
Riyanto, Slamet.
"The 1 Student's Choiche Toefl :Test Strategy for Structure and Written Expression".
Yogyakarta:
Pustaka Pelajar,
2015.
Buku.