Gaya APA
Teaching Elementary School Mathematics. (1981).
:
.
Gaya Chicago
Teaching Elementary School Mathematics.
3rd ed..
:
,
1981.
Text.
Gaya MLA
Teaching Elementary School Mathematics.
3rd ed..
:
,
1981.
Text.
Gaya Turabian
Teaching Elementary School Mathematics.
:
,
1981.
Print.