APA Style
The Encyclopedia Americana International Edition Volume 21. (1988).
America:
Grolier Incorporated.
Chicago Style
The Encyclopedia Americana International Edition Volume 21.
.
America:
Grolier Incorporated,
1988.
Buku.
MLA Style
The Encyclopedia Americana International Edition Volume 21.
.
America:
Grolier Incorporated,
1988.
Buku.
Turabian Style
The Encyclopedia Americana International Edition Volume 21.
America:
Grolier Incorporated,
1988.
Buku.