APA Style
Popenu, David. (1969).
The Urban - Industrial Frontier .
:
.
Chicago Style
Popenu, David.
The Urban - Industrial Frontier.
:
,
1969.
.
MLA Style
Popenu, David.
The Urban - Industrial Frontier.
:
,
1969.
.
Turabian Style
Popenu, David.
The Urban - Industrial Frontier.
:
,
1969.
.