Gaya APA
PARK, S., Christin, I.
(2009).
Why? Happy math 2
(
Cet. 1)
.
Jakarta:
Elex Media Komputindo.
Gaya MLA
PARK, Sang-Wook., Christin, Irene.
"Why? Happy math 2".
Cet. 1
Jakarta:
Elex Media Komputindo,
2009.
Text.