Walpole, Ronald E., author
Macmillan, 1972
Buku Teks
Benedict, R. Ralph, author
Prentice-Hall, 1976
Buku Teks
Walpole, Ronald E., author
Prentice-Hall, 1993
Buku Teks
Hoffman, Joe D., author
CRC Press, 2001
Buku Teks
Nyhoff, Larry, author
Prentice-Hall, 1997
Buku Teks