Fletcher, Glenn, author
Wm. C. Brown, 1994
Buku Teks
Burcham, W.E.
Longman , 1978
Buku Teks
Leon, M.
Academic Press , 1973
Buku Teks
Enge, Harald A.
Addison-Wesley Publishing , 1966
Buku Teks
Harris, Edward G., author
John Wiley & Sons, 1975
Buku Teks