Schneider, Erich, author
George Allen and Unwin, 1963
Buku Teks
Twomey, David P.
South-Western Publishing Company, 1986
Buku Teks
Player, Macka
West Publishing, 1992
Buku Teks
Todd, Maria K.
CRC Press, Taylor & Francis Group, 2011
Buku Referensi
Chandran, Ravi, author
Prentice-Hall, 2005
Buku Teks