Djoko Sumitro, author
Gadjah Mada University Press, 1990
Buku Teks
Ghosh, Premamoy, author
Tata McGraw-Hill, 2004
Buku Teks SO
Brown, P. Charles, author
Oxford University Press, 1984
Buku Teks
Rexroad, Robert A.
John Wiley & Sons, 1983
Buku Teks
consultant editor, D.E. Hathway
Harrap, 1985
Buku Referensi