Jarvis, Peter J., author
Prentice-Hall, 2000
Buku Teks
edited by S.E. Jorgensen, B. Halling-Sorensen, S.N. Nielsen
Lewis Publishers, 1996
Buku Referensi
Shmelev, Stanislav E., author
[Springer, Springer], 2012
eBooks
E. David Ford, author
Cambridge University Press, 2000
eBooks
edited by J. Rozema and J.A.C. Verkleij
Kluwer Academic , 1991
Buku Teks