Gaya APA
The New Book of Knowledge (Combined Index Volume 21). (1983).
USA:
Grolier Incorporated.
Gaya Chicago
The New Book of Knowledge (Combined Index Volume 21).
Combined Index Volume 21, 1983.
USA:
Grolier Incorporated,
1983.
Text.
Gaya MLA
The New Book of Knowledge (Combined Index Volume 21).
Combined Index Volume 21, 1983.
USA:
Grolier Incorporated,
1983.
Text.
Gaya Turabian
The New Book of Knowledge (Combined Index Volume 21).
USA:
Grolier Incorporated,
1983.
Print.