Gaya APA
Life-Span Development. (2006).
New York:
[s.n.].
Gaya Chicago
Life-Span Development.
.
New York:
[s.n.],
2006.
Text.
Gaya MLA
Life-Span Development.
.
New York:
[s.n.],
2006.
Text.
Gaya Turabian
Life-Span Development.
New York:
[s.n.],
2006.
Print.