Akl, Selim G.
Prentice Hall International, 1989
Buku Teks SO
Chaudhuri, Pranay, 1951-
Prentice-Hall, 1992
Buku Teks SO
Goodman, Seymour E.
McGraw-Hill Kogakusha, 1977
Buku Teks SO
Loudon, Kyle
O`Reilly, 1999
Buku Teks SO
Koren, Israel, 1945-
Prentice Hall International, 1993
Buku Teks SO