Gaya APA
9660. (1).
:
State&National Standards.
Gaya Chicago
9660.
The Earth (Social Studies).
:
State&National Standards,
1.
11/O/EDU/061.
Gaya MLA
9660.
The Earth (Social Studies).
:
State&National Standards,
1.
11/O/EDU/061.
Gaya Turabian
9660.
:
State&National Standards,
1.
11/O/EDU/061.