Sykes, Peter
Longmans, 1966
Buku Referensi
Simpson, Phil
[Springer, ], 2012
eBooks
Hughes, Fredrick W.
Prentice-Hall, 1983
Buku Referensi
Traister, John E.
Reston Publishing Company, 1979
Buku Referensi
Hughes, Fredrick W.
Prentice-Hall, 1983
Buku Referensi