Richterich, Rene
Identifying the needs of adults learning a foreign language
Pergamon Press, 1980
 Buku Teks SO
Elger, Alfred Johm
Problems in engineering design / by A. J. Elger, E.K. Busch
McGraw-Hill, 1966
 Buku Teks SO
English grammatical structure : a general syllabus for teachers / L.G. Alexander...[et al.]
Longman Group UK Limited , 1975
 Buku Teks SO
Alexander, L.G.
Longman english grammer/L.G. Alexander; Consultant, R.A. Close
Longman , 1988
 Buku Teks SO
Maeijer, J.M.M.
A modern European company law system : commentary on the 1976 Dutch legislation
Sijthoff & Noordhoff International, 1978
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