Gaya APA
Incorprorated, G. (1996).
The Encylopedia Americana International Edition Volume 20 (Vol. 20).
United States Of America:
Grolier Incorporated.
Gaya MLA
Incorprorated, Grolier.
"The Encylopedia Americana International Edition Volume 20".
Vol. 20
United States Of America:
Grolier Incorporated,
1996.
Text.