Gaya APA
Crary, E.
(2005).
Children's Problem Solving: Aku Ingin Ikut Bermain
.
Yogyakarta:
Penerbit Kanisius.
Gaya MLA
Crary, Elizabeth.
"Children's Problem Solving: Aku Ingin Ikut Bermain".
Yogyakarta:
Penerbit Kanisius,
2005.
.