Gaya APA
Piaget, J.
(2010).
Psikologi anak (the psychology of the child)
.
Yogyakarta:
Pustaka Pelajar.
Gaya MLA
Piaget, Jean.
"Psikologi anak (the psychology of the child)".
Yogyakarta:
Pustaka Pelajar,
2010.
Text.