appendix = singular,
appendices = plural
Appendices are used when the incorporation of material in the body of the work would make it poorly structured or too long and detailed.
The appendix may be used for helpful, supporting or essential material that would otherwise clutter, break up or be distracting to the text.
Other people’s work will be referred to, not quoted, in the appendix.
Appendices may include some of the following:
- supporting evidence
- contributory facts
- specialised data [raw data appear in the appendix, summarised data appear in the body of the text.