Reference
Mention of
Synonyms: Mention of, comment on, citation of, allusion to, remark about, and instance of.
Source
Synonyms: Source, citation, credit, footnote, bibliography, information source, authority, note, and bibliographical data.
Testimonial
Synonyms: Testimonial, recommendation, backing, character reference, good word, and credentials.
Example Sentences
Please include a reference for clarification.
The book has multiple reference sections.
He made a reference to history.
Can you provide a reference link?