Gaya APA
Aheon, W., Eva, .
(2011).
Mengenal Tanda Zaman 2012 Melalui Obama
(
Cet.1)
.
Yogyakarta:
Pustaka Solomon.
Gaya MLA
Aheon, Weal., Eva, .
"Mengenal Tanda Zaman 2012 Melalui Obama".
Cet.1
Yogyakarta:
Pustaka Solomon,
2011.
Textbook.