The extra content which is of least importance and which supports your report is known as Appendices.
The list of references section at the end of a book
Appendices
(Appendices is the plural of the noun appendix) Most of the statistical information in his book was collected in the appendices. The legislature's appendices to the jobs bill consisted of several dozen pages.
There are five appendices to Constitution of India.
A Year with Swollen Appendices was created in 1995.
appendices starts with a and experimental data with e
A Year with Swollen Appendices has 424 pages.
How about something like... The appendices of a book list points of reference.
Appendices.\
If you mean the bodily organ,it's "appendixes",and the portion at the end of a book should be "appendices".
There are four (4) active appendices
Generally, when speaking of the vermiform appendix, the plural is appendixes; but when speaking of additional material added to a scholarly work or an official document, the plural is appendices.
  Hazard-specific Appendices.