Leavell, Robert N., author
West Publishing, [date of publication no identified]
Buku Referensi
Kovacic-Fleischer, Candace S., author
Thomson/West, 2011
Buku Teks
West , 1985
Buku Teks
Cound, John J.
West , 1974
Buku Teks
Tey, Tsun Hang, author
Lexis Nexis, 2010
Buku Teks