Penggayaan APA
WADSWOERTH, Barry J. (1979).
Piagets theory of cognitive development (2nd ed.).
New York:
Longman.
Chicago Style
WADSWOERTH, Barry J.
Piagets theory of cognitive development.
2nd ed.
New York:
Longman,
1979.
Text.
MLA Style
WADSWOERTH, Barry J.
Piagets theory of cognitive development.
2nd ed.
New York:
Longman,
1979.
Text.
Turabian Style
WADSWOERTH, Barry J.
Piagets theory of cognitive development.
2nd ed.
New York:
Longman,
1979.
Print.