APA Style
Riyanto, Slamet. (2012).
Speaking english is easy .
Yogyakarta:
Pustaka Widyatama.
Chicago Style
Riyanto, Slamet.
Speaking english is easy.
Yogyakarta:
Pustaka Widyatama,
2012.
Text.
MLA Style
Riyanto, Slamet.
Speaking english is easy.
Yogyakarta:
Pustaka Widyatama,
2012.
Text.
Turabian Style
Riyanto, Slamet.
Speaking english is easy.
Yogyakarta:
Pustaka Widyatama,
2012.
Print.