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
Hart, Chris
Sage, 2003
Buku Teks
Cooper, Harris M.
Sage, 1989
Buku Teks
Free Pr, 1959
Buku Teks