In a citation, the correct information that should generally be included is author and source type. However, depending on the citation style (like APA, MLA, Chicago, etc.), there may be additional elements required, such as the title, publication date, and source location (like a publisher or URL).
In summary, key elements often include:
- Author(s)
- Title of the work
- Publication date
- Source type (book, journal, website, etc.)
- Location of the source (publisher name, URL, etc.)
In this specific context you provided, the most relevant answer would be "author and source type."