Gaya APA
GWINN, ROBERT P. (1990).
The New Encyclopaedia Britannica : Macropaedia knowledge in depth, volume 20 .
Chicago:
Encyclopaedia Britannica.
Gaya Chicago
GWINN, ROBERT P.
The New Encyclopaedia Britannica : Macropaedia knowledge in depth, volume 20.
Chicago:
Encyclopaedia Britannica,
1990.
Buku.
Gaya MLA
GWINN, ROBERT P.
The New Encyclopaedia Britannica : Macropaedia knowledge in depth, volume 20.
Chicago:
Encyclopaedia Britannica,
1990.
Buku.
Gaya Turabian
GWINN, ROBERT P.
The New Encyclopaedia Britannica : Macropaedia knowledge in depth, volume 20.
Chicago:
Encyclopaedia Britannica,
1990.
Buku.