Ignizio, James P., author
Sage, 1985
Buku Teks
Feiring, Bruce R., author
Sage University Paper, 1986
Buku Teks
Kim, Chaiho, author
Rinehart and Winston, 1971
Buku Teks
Dobson, Annette J., author
Chapman & Hall, 1993
Buku Teks
Dobson, Annette J., author
CRC Press, Taylor & Francis Group, 2008
Buku Teks