Polit, Denise F., author
J.B. Lippincott, 1987
Buku Teks
Polit, Denise F., author
Lippincott, 1999
Buku Teks
Campbell, Enid Mona, author
The Law Book, 1967
Buku Teks
Crano, William D., author
Lawrence Erlbaum Assossiate, 2002
Buku Teks
Schwab, Donald P, author
New jersey, 2005
Buku Teks