APA Style
Encyclopedia Americana : Volume 21 ( Oporto to Photoengraving). (1995).
Amerika:
GROLIER INCORPORATED.
Chicago Style
Encyclopedia Americana : Volume 21 ( Oporto to Photoengraving).
Volume 21.
Amerika:
GROLIER INCORPORATED,
1995.
BUKU.
MLA Style
Encyclopedia Americana : Volume 21 ( Oporto to Photoengraving).
Volume 21.
Amerika:
GROLIER INCORPORATED,
1995.
BUKU.
Turabian Style
Encyclopedia Americana : Volume 21 ( Oporto to Photoengraving).
Amerika:
GROLIER INCORPORATED,
1995.
BUKU.