Gaya APA
Riyanto, S., Mirawati, .
(2017).
Vocabulary For TOEFL Exercises
.
Yogyakarta:
Pustaka Pelajar.
Gaya MLA
Riyanto, Slamet., Mirawati, .
"Vocabulary For TOEFL Exercises".
Yogyakarta:
Pustaka Pelajar,
2017.
Mata Kuliah Umum.