edited by Edgar T. Thompson, Robert E. Park
Duke University Press, 1939
Buku Teks
Kinloch, Graham C., author
McGraw-Hill , 1974
Buku Teks
Banton Michael, author
Tavistock Publications, 1969
Buku Teks
Mason, Philip, author
Oxford University Press, 1970
Buku Teks
Blalock, Hubert M., author
Prentice-Hall, 1982
Buku Teks