Gaya APA
Ratti, John. (1977).
The New Book Of Knowledge Annual 1977 .
New York:
Grolier Incorporated.
Gaya Chicago
Ratti, John.
The New Book Of Knowledge Annual 1977.
New York:
Grolier Incorporated,
1977.
Text.
Gaya MLA
Ratti, John.
The New Book Of Knowledge Annual 1977.
New York:
Grolier Incorporated,
1977.
Text.
Gaya Turabian
Ratti, John.
The New Book Of Knowledge Annual 1977.
New York:
Grolier Incorporated,
1977.
Print.