Gaya APA
The Encyclopedia Americana volume 19. (1977).
:
Americana Corporation.
Gaya Chicago
The Encyclopedia Americana volume 19.
1.
:
Americana Corporation,
1977.
Text.
Gaya MLA
The Encyclopedia Americana volume 19.
1.
:
Americana Corporation,
1977.
Text.
Gaya Turabian
The Encyclopedia Americana volume 19.
:
Americana Corporation,
1977.
Print.