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
Gass, Saul I.
McGraw-Hill, 1985
Buku Teks
Marwan Asri, author
BPFE, 1986
Buku Teks