Gaya APA
PIAGET, J.
(2010).
Psikologi Anak : The Psychological of The Child
.
Yogyakarta:
Pustaka Pelajar.
Gaya MLA
PIAGET, Jean.
"Psikologi Anak : The Psychological of The Child".
Yogyakarta:
Pustaka Pelajar,
2010.
Book.