Gaya APA
Hacker, Jeff. (1981).
The Americana annual 1981 .
United States of America:
Grolier Limited.
Gaya Chicago
Hacker, Jeff.
The Americana annual 1981.
United States of America:
Grolier Limited,
1981.
Text.
Gaya MLA
Hacker, Jeff.
The Americana annual 1981.
United States of America:
Grolier Limited,
1981.
Text.
Gaya Turabian
Hacker, Jeff.
The Americana annual 1981.
United States of America:
Grolier Limited,
1981.
Print.