Gaya APA
Kail, R, V., Cavanaugh, J, C. (2007).
Human Development : A Life-Span View 4'th Ed. (4).
California:
Thomson Wadsworth.
Gaya MLA
Kail, Robert, V.., Cavanaugh, John, C..
"Human Development : A Life-Span View 4'th Ed.".
4
California:
Thomson Wadsworth,
2007.
Text.