Gaya APA
Ikranegara, Y, .
(2005).
Asal Mula Danau Toba
(
Cet.1)
.
Surabaya:
Cahaya Agency.
Gaya MLA
Ikranegara, Yudhistira, .
"Asal Mula Danau Toba".
Cet.1
Surabaya:
Cahaya Agency,
2005.
Text.