What are two circumstances when you need to include more information to distinguish one author or title from another?

You need to include more information to distinguish authors or titles when multiple authors have the same name, especially if they are in the same field or genre, such as "John Smith." Additionally, when a title is common or shared by multiple works, such as "The Road," you should provide additional details, such as the author's name and publication year, to clarify which specific work you are referencing.