edited by C. Michael Bowers
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Buku Teks SO
edited by David R. Senn, Paul G. Stimson
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Buku Teks
Collins, W.J.M., author
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Buku Referensi
edited by Catherine Adams, Romina Carabott, Sam Evans
Wiley-Blackwell, 2014
Buku Teks SO
edited by Malcolm Coulthard and Alison Johnson
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Buku Teks