...refer to the name of the published edition and page numbers.
...scan a page from the physical book and annotate it.
...download an image of a page and annotate it.
...write out short quotes from the text for the purpose of analysis.
...write out a full paragraph and annotate it if I acknowledge the publication I took it from.
...show a low quality partial image of the book front cover.
...use a high quality image of the book cover.
...promote a specific published version of the text as the best version.