Niederhoffer, Victor
John Wiley & Sons, 1997
Buku Teks
Edited by Cecilia Genereux, Paul D. Moeller
Libraries Unlimited, 2009
Buku Referensi
Akers, Susan Grey, author
American Library Association, 1954
Buku Referensi
Greenwood Press , 1991
Buku Teks
Chan, Lois Mai, author
McGraw-Hill, 1994
Buku Teks