Gaya APA

Yahya, H. (2009.). Tanda-tanda Kiamat (Signs of The Last Day) . : PT. Nada Cipta Raya,.

Gaya MLA

Yahya, Harun. "Tanda-tanda Kiamat (Signs of The Last Day)". : PT. Nada Cipta Raya,, 2009.. .