Rubin, Sol, author
Oceana Publications, 1976
Buku Teks
Rubin, H. Ted, author
McGraw-Hill, 1985
Buku Teks
Eldefonso, Edward
John Wiley , 1983
Buku Teks
Coffey, Alan R., author
Prentice-Hall, 1974
Buku Teks
Lawrence, Richard, author
Sage, 2008
Buku Teks