Wickersham, John, author
Haynes Publishing, 1993
Buku Referensi
Jain, S.C., author
Tata McGraw-Hill , 1980
Buku Teks
Porter, Lindsay, author
Porter Publishing, 1995
Buku Referensi
Dempsey, Paul, author
McGraw-Hill, 2010
Buku Teks
Michael G. Grantham, editor
Routledge, 2011
Buku Teks