Sorokin, Pitirim A.
American Book, 1941
Buku Teks
Barnett, Homer Garner, author
McGraw-Hill, 1953
Buku Teks
Browne, Elspeth, author
University of New South Wales, 1979
Buku Teks
edited by Michael Harris Bond
Sage, 1988
Buku Teks
edited by Stephen R. Graubard
Angus and Robertson, 1985
Buku Teks