Gaya APA
GUTH, Hans P. (1981).
Our world to day .
Lexington:
DC Healt.
Gaya Chicago
GUTH, Hans P.
Our world to day.
Lexington:
DC Healt,
1981.
Text.
Gaya MLA
GUTH, Hans P.
Our world to day.
Lexington:
DC Healt,
1981.
Text.
Gaya Turabian
GUTH, Hans P.
Our world to day.
Lexington:
DC Healt,
1981.
Print.