Stroyan, K.D.
Academic Press, 1993
Buku Teks
Devitt, John S.
Brookd/Cole, 1993
Buku Teks
Jonathan M. Borwein, Matthew P. Skerritt
Springer Science;, 2012
eBooks
Weir, Maurice D.
Prentice-Hall, 1982
Buku Teks
Wheeler, Ruric E.
John Wiley & Sons, 1996
Buku Teks