Pearce, Robert
Butterworth, 1998
Buku Teks
Todd, Paul
Blackstone Press, 1994
Buku Referensi
Leavell, Robert N.
West Publishing, [date of publication no identified]
Buku Referensi
Kovacic-Fleischer, Candace S.
Thomson/West, 2011
Buku Teks
Todd, Paul
Blackstone Press, 1996
Buku Referensi