Webster's new world dictionary of the American language
David B. Guralnik, editor in chief
Prentice-Hall, 1986
 Buku Referensi
Webster's New World dictionary of the American language
David B. Guralnik, editor in chief
William Collins Publishers, 1976
 Buku Referensi
English as an international language in Asia: implications for language education
editors, Andy Kirkpatrick, Roland Sussex
Springer, 2012
 eBooks
Australian English : the language of a new society
edited by Peter Collins and David Blair
University of Queensland Press, 1989
 Buku Teks
English Today: the international review of the english language
Great Britain at the University Press, Cambridge, 1992
 Majalah, Jurnal, Buletin
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