Wise, Claude Merton
Prentice-Hall, 1957
Buku Teks
Clark, John, author
Blackwell, 1995
Buku Teks
Zsiga, Elizabeth C., author
West Sussex Wiley-Blackwell, 2013
Buku Teks
Lass, Roger, author
IKIP Semarang Press , 1984
Buku Teks
Cambridge University Press, 2004
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