Explanatory notes.
Explanatory notes. MLA citation style asks you to include explanatory notes for information or comments that don’t readily fit into your text but are needed for clarification or further explanation. In addition, MLA permits bibliographic notes for information about or evaluation of a source, or to list multiple sources that relate to a single point. Use superscript numbers in the text to refer readers to the notes, which may appear as endnotes (under the heading Notes on a separate page immediately before the list of works cited) or as footnotes at the bottom of each page where a superscript number appears.
example of superscript number in text
Although messaging relies on the written word, many messagers disregard standard writing conventions. For example, here is a snippet from an IM conversation between two teenage girls:1
example of explanatory note
1. This transcript of an IM conversation was collected on 20 Nov. 2012. The teenagers’ names are concealed to protect their privacy.