Carl M. White and associates: William W. Brickman ... [and others]
American Library Assoiation, 1973
Buku Referensi
edited by Norman MacKenzie
The New American Library, 1968
Buku Teks SO
edited by Bert F. Hoselitz
Free Press, 1959
Buku Teks SO
Hart, Chris
Sage, 2003
Buku Teks SO
Cooper, Harris M.
Sage, 1989
Buku Teks SO