IEEE style

The Institute of Electrical and Electronics Engineers (IEEE) style is a numbered system. Numbered systems assign a number to a reference in the order in which they are cited in the text.

For example:

In-Text

… system composed of interrelated parts [1]

List of References

[1]       W. D. Blair, J. E. Conte, and T. R. Rice, "An instructive example of homomorphic signal 
           processing," Education, IEEE Transactions on, vol. 38, pp. 211-216, 1995.
[2]       K. W. Kolodziej and J. Hjelm, Local positioning systems : LBS applications and services.
           Boca Raton: CRC/Taylor & Francis, 2006.

Guidelines can be found in the Information for Authors section of the IEEE Website.