Gaya APA
Wrigley, E.A. (1969).
Population and History .
New York:
World University Library.
Gaya Chicago
Wrigley, E.A.
Population and History.
New York:
World University Library,
1969.
.
Gaya MLA
Wrigley, E.A.
Population and History.
New York:
World University Library,
1969.
.
Gaya Turabian
Wrigley, E.A.
Population and History.
New York:
World University Library,
1969.
.