Thompson, F.G.
Longman Scientific and Technical, 1992
Buku Teks SO
Thompson, F.G.
Longman, Green, 1968
Buku Teks SO
Thompson, F.G.
Longman Scientific and Technical, 1992
Buku Teks SO
McPartland, Joseph F.
McGraw-Hill, 1984
Buku Referensi
Marks, Trevor E.
William Ernest, 1992
Buku Teks SO