Otnes, Robert K., author
John Wiley & Sons, 1978
Buku Teks
Villemeur, Alain, author
John Wiley & Sons, 1991
Buku Teks
edited by Jack D. Griffith
John Wiley & Sons, 1982
Buku Teks
DiAntonio, Angelo E.
Prentice-Hall, 1986
Buku Teks
Gordy, Walter, author
John Wiley & Sons, 1980
Buku Teks