edited by Mario T. Tabucanon and Pakorn Adulbhan
Pergamon, 1981
Buku Teks
Jones, Peter H.
USA : McGraw-Hill Inc., 1998,
Buku Referensi
Burton, T.D., author
McGraw-Hill, 1994
Buku Teks
edited by Julie Dugdale
Springer-Verlag, 2012
eBooks
Whitten, Jeffrey L.
2001
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