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.