Gaya APA
Riyanto. (2007).
English tests for senior high school students .
Yogyakarta:
Pustaka Pelajar.
Gaya Chicago
Riyanto.
English tests for senior high school students.
Yogyakarta:
Pustaka Pelajar,
2007.
Text.
Gaya MLA
Riyanto.
English tests for senior high school students.
Yogyakarta:
Pustaka Pelajar,
2007.
Text.
Gaya Turabian
Riyanto.
English tests for senior high school students.
Yogyakarta:
Pustaka Pelajar,
2007.
Print.