Decius, John Courtney, author
McGraw-Hill, 1977
Buku Teks
Dowding, Charles H., author
Prentice-Hall, 1996
Buku Teks
Grover, G. K., author
Other Book of Interest, 1977
Buku Teks
Hartog, J.P. Den, author
McGraw-Hill, 1956
Buku Teks
Hosford, William F., author
Oxford University Press, 1993
Buku Teks