Gaya APA
KIM, Y., Christin, I.
(2009).
Why? Happy math 1
(
Cet. 1)
.
Jakarta:
Elex Media Komputindo.
Gaya MLA
KIM, Yoon-Soo., Christin, Irene.
"Why? Happy math 1".
Cet. 1
Jakarta:
Elex Media Komputindo,
2009.
Text.