Gaya APA
Astuti, I, Y., A, W, T, D, Y, D. (2009).
Let's Study Adverbs = Mempelajari Kata Keterangan .
Bandung:
Pakar Raya.
Gaya MLA
Astuti, Indri, Yuli., A, Widda, T.N., Dan, Yuniarti, Dwi.
"Let's Study Adverbs = Mempelajari Kata Keterangan".
Bandung:
Pakar Raya,
2009.
Book.