Gaya APA
Encyclopedia Americana. (2006).
USA:
Grolier Education.
Gaya Chicago
Encyclopedia Americana.
Edisi Revisi.
USA:
Grolier Education,
2006.
Text.
Gaya MLA
Encyclopedia Americana.
Edisi Revisi.
USA:
Grolier Education,
2006.
Text.
Gaya Turabian
Encyclopedia Americana.
USA:
Grolier Education,
2006.
Print.