Gaya APA
Utama, Y.
(2012).
Becoming A Genius Speaker
.
Jakarta:
Jakarta.PT. Gramedia Pustaka Utama.
Gaya MLA
Utama, Yasier.
"Becoming A Genius Speaker".
Jakarta:
Jakarta.PT. Gramedia Pustaka Utama,
2012.
Koleksi Elektronik.