Al-Hawamdeh, Suliman, author
McGrawHill, 2002
Buku Teks
Miltiadis Lytras, John M. Carroll, Ernesto Damiani, Robert D. Tennyson
Springer-Verlag , 2008
Buku Teks
Beekman, George, author
Pretince Hall, 2002
Buku Teks
Negroponte, Nicholas, author
Mizan, 1998
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Duff, Alistair S., author
Routledge, 2012
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