IEEE is used in engineering and in ICT studies.
The references are numbered in the order they appear in the text and are enclosed in square brackets, e.g. . If you need to cite a particular page, it can be done like this: [1:34]. A reference list is placed at the end of the text containing full details of the sources. The references appear in numerical order using the same numbers as in the text.
See IEEEs official page for more information.