Gaya APA
IKRANEGARA, Y.
().
ASAL MULA DANAU TOBA
.
SURABAYA:
CV CAHAYA EGENCY.
Gaya MLA
IKRANEGARA, YUDHISTIRA.
"ASAL MULA DANAU TOBA".
SURABAYA:
CV CAHAYA EGENCY,
.
.