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Macmillan, 1970
Buku Teks
The McGraw-Hill Companies, {s.a}
Majalah, Jurnal, Buletin
EMAP, Royal Mail International c/o Smartmail, {s.a}
Majalah, Jurnal, Buletin
Place, Jeffrey Wayne
John Wiley & Son, 2007
Multimedia
Ching, Francis D.K., 1943-, author
John Wiley & Sons, 2003
Buku Teks