Winardi, author
Alumni, 1974
Buku Teks
Gass, Saul I., author
Mc Graw Hill, 1975
Buku Teks
Ignizio, James P., author
Sage, 1985
Buku Teks
Feiring, Bruce R., author
Sage University Paper, 1986
Buku Teks
Swanson, Leonard W., author
Mc Graw Hill, 1980
Buku Teks