Prescott, J.R.V.
Methuen & Co., 1986
Buku Teks
Hansen, Derek L.
Morgan Kaufmann, 2011
Buku Teks SO
Easley, David
Cambridge University Press, 2018
Buku Teks SO
Connor, F.R.
Edward Arnold, 1972
Buku Teks SO
Hang, Xing
Cambridge University Press, 2015
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