Singer, Erwin
Random House, 1965
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Vicki Smith, Patrizia Collard, Paula Nicolson, Rowan Bayne
Mc Graw-Hill, 2012
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Wolberg, Lewis R.
Grune & Stratton, 1965
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Totok S. Wiryasaputra
Pustaka Referensi , 2019
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Whitaker, Carl A.
The Blakiston Company, 1953
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