Gaya APA
Early cognitive development. (1979).
London:
Croom Helm.
Gaya Chicago
Early cognitive development.
.
London:
Croom Helm,
1979.
Text.
Gaya MLA
Early cognitive development.
.
London:
Croom Helm,
1979.
Text.
Gaya Turabian
Early cognitive development.
London:
Croom Helm,
1979.
Print.