Gaya APA
dkk, N, A, S.
(2011).
Rahasia Besar Anak Indigo
.
Gorontalo:
IN AzNa Books.
Gaya MLA
dkk, Nur, Alam, Soecipto,.
"Rahasia Besar Anak Indigo".
Gorontalo:
IN AzNa Books,
2011.
Text.