Hagin, Robert, author
J. Irwin , 1973
Buku Teks
Radcliffe, Robert C.
Addison-Wesley, 1997
Buku Teks
Vichas, Robert
Arlington House , 1976
Buku Teks
Patel, Alpesh B, author
Palgrave Macmillan, 2005
Buku Teks
Stoken, Dick A.
McGraw-Hill, 1978
Buku Teks