Hill, M.C.
Butterworth-Heinemann , 1991
Buku Teks
Hill, C. M.
Oxford [Englan] Wright 1991,
Buku Referensi
Howe, Geoffrey Leslie, author
Butterworth, 1990
Buku Teks
Meechan, John G., author
Quintessence, 2010
Buku Teks
Agrawal, Nikita, author
Lambert Academic Publishing, 2013
Buku Teks