Attachment refers to an article or reference attached to the back of the text, which is a supplementary part of the instruction or paper. Because it is too big or based on a copy, it is not convenient to incorporate it into the text. The attachment will be placed at the end of the paper.

Attachments can include files, pictures, audio, video, software and so on. If there are questionnaires, interviews and other research methods in the paper, there must be appendices or attachments. If there is no appendix, your paper is incomplete.