Carvan, John, author
LBC Information Services, 1997
Buku Teks
Carvan, John, author
LBC Information Services Holmes Beach, 1997
Buku Teks
Hastings House , 1953
Buku Teks
Israel Doron, Ann M. Soden, editors
[Springer, Springer], 2012
eBooks
Blanpain, Roger, author
Kluwer, 2008
Buku Teks