St,Paul,Minn, 1994
Buku Teks
Glendon, Mary Ann
St. Paul, Minn West Publishing 1991,
Buku Teks
Glendon, Mary Ann
ST. Paull Minn, 1999
Buku Teks
Jones, Harry W., author
The Foundation Press, 1980
Buku Teks
Glendon, Mary Ann
St.Paul,Min., 1982
Buku Teks