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Buku Teks
Dnyansagar, V. R.
McGraw-Hill, 1992
Buku Teks
Norstog, Knut
Northern Illinois University, 1969
Buku Teks
Cibas, Edmun S.
PA Elsevier Saunders, 2014
Buku Teks
editor, D.A. Murray
Pergamon Press, 1980
Buku Teks