Gaya APA
ENCYLOPEDIA AMERICANA 30. (1983).
USA:
Grolier Incorporated.
Gaya Chicago
ENCYLOPEDIA AMERICANA 30.
.
USA:
Grolier Incorporated,
1983.
Referens.
Gaya MLA
ENCYLOPEDIA AMERICANA 30.
.
USA:
Grolier Incorporated,
1983.
Referens.
Gaya Turabian
ENCYLOPEDIA AMERICANA 30.
USA:
Grolier Incorporated,
1983.
Referens.