Gaya APA
O'Brien, Liz. (2013).
Speak well .
New York:
Springer Science r Business Media.
Gaya Chicago
O'Brien, Liz.
Speak well.
New York:
Springer Science r Business Media,
2013.
Buku.
Gaya MLA
O'Brien, Liz.
Speak well.
New York:
Springer Science r Business Media,
2013.
Buku.
Gaya Turabian
O'Brien, Liz.
Speak well.
New York:
Springer Science r Business Media,
2013.
Buku.