Allen, R.G.D., author
Hutchinson University Library, 1972
Buku Teks
Freund, John E., author
Prentice-Hall, 1980
Buku Teks
Spiegel, Murray R., author
McGraw-Hill, 1972
Buku Teks
Spiegel, Murray R., author
McGraw-Hill, 1961
Buku Teks
Steel, Robert George Douglas, 1917-, author
McGraw-Hill, 1980
Buku Teks