Schoenberg, I.J.
Society for Industrial and Applied Mathematics, 1993
eBooks
May, J. Lewis
Geoffrey Bles, 1946
Buku Teks
Yudi Santoso
Pustaka Promethea, 2001
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Bienkowski, Andrew
Pocket Books, 2009
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Nin, Anais
Penguin Books, 2001
Buku Teks