Gaya APA
Pettigrew, Mark. (1986).
Planet Earth .
:
Franklin Watts.
Gaya Chicago
Pettigrew, Mark.
Planet Earth.
:
Franklin Watts,
1986.
Reference.
Gaya MLA
Pettigrew, Mark.
Planet Earth.
:
Franklin Watts,
1986.
Reference.
Gaya Turabian
Pettigrew, Mark.
Planet Earth.
:
Franklin Watts,
1986.
Reference.