Gaya APA
Berk, L, E.
(2007).
Development Through The Lifespan 4'th Ed.
(
4)
.
Boston:
Allyn & Bacon.
Gaya MLA
Berk, Laura, E..
"Development Through The Lifespan 4'th Ed.".
4
Boston:
Allyn & Bacon,
2007.
Text.