Gaya APA
Turner, Jeffrey S., Helms, Donald B.. (1991).
Lifespan development (4th ed).
Fort Worth:
Holt, Rinehart and Winston.
Gaya Chicago
Turner, Jeffrey S., Helms, Donald B..
Lifespan development.
4th ed
Fort Worth:
Holt, Rinehart and Winston,
1991.
Text.
Gaya MLA
Turner, Jeffrey S., Helms, Donald B..
Lifespan development.
4th ed
Fort Worth:
Holt, Rinehart and Winston,
1991.
Text.
Gaya Turabian
Turner, Jeffrey S., Helms, Donald B..
Lifespan development.
4th ed
Fort Worth:
Holt, Rinehart and Winston,
1991.
Print.