Slavin, Steve
John Wiley & Sons, 2007
Buku Teks
Anton, Howard
Academic Press, 1982
Buku Teks
Strang, Gilbert
Wellesley Cambridge Press, 1986
Buku Referensi
Hildebrand, Francis Begnaud
Prentice-Hall, 1968
Buku Teks SO
Ashley, Ruth
John Wiley & Sons, 1980
Buku Teks