Brock, Linda
John Wiley & Sons, 2005
Buku Referensi
Davids, W.J.M.
Kluwer, 1994
Buku Teks
McGowan, Maryrose
John Wiley & Sons, [Date of publication not identified]
Buku Teks
McGowan, Maryrose
John Wiley & Sons, 1996
Buku Teks
Riordan, Jan
Mosby, 1983
Buku Teks