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