Gaya APA
PEI,Mario. (1980).
THE NEW Book of knowledge .
Canada:
Grolier International.
Gaya Chicago
PEI,Mario.
THE NEW Book of knowledge.
Canada:
Grolier International,
1980.
Reference.
Gaya MLA
PEI,Mario.
THE NEW Book of knowledge.
Canada:
Grolier International,
1980.
Reference.
Gaya Turabian
PEI,Mario.
THE NEW Book of knowledge.
Canada:
Grolier International,
1980.
Reference.