Martin, C. Leslie, author
Macmillan, 1970
Buku Teks
Ching, Francis D.K., 1943-, author
John Wiley & Sons, 2003
Buku Teks
Hill, Francis S., author
Macmillan, 1990
Buku Teks
Hearn, Donald, author
Prentice-Hall, 1986
Buku Teks
Earle, James H., author
Addison-Wesley, 1985
Buku Teks