APA Style
Phelps, Harold A. (1961).
Contemporary social problems .
:
.
Chicago Style
Phelps, Harold A.
Contemporary social problems.
:
,
1961.
.
MLA Style
Phelps, Harold A.
Contemporary social problems.
:
,
1961.
.
Turabian Style
Phelps, Harold A.
Contemporary social problems.
:
,
1961.
.