Final answer:
The source information for this document is similar to document A in having the same author, but different in terms of topic. Document A is different in having a different author but the same topic.
Step-by-step explanation:
The source information for this document is similar to and different from document A in that it shares the same author but covers a different topic. This means that the author is consistent, but the subject matter is not. Document A, on the other hand, has different author and same topic. This means that the author is different, but the topic is the same as the source document.