Booth, Anne
Allen and Unwin, 1988
Buku Teks
Chai Podhisita
Kyoto University, 2017
Artikel Jurnal
Lepi Tanadjaja Tarmidi
2006
Artikel Jurnal
Hill, Hal, 1948-
RajaGrafindo Persada, 2002
Buku Teks
Mears, Leon A.
GadjahMada University Press, 1981
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