Mark used a subject database for Communications to find an article about Internet regulation and net neutrality. What is the most efficient way for him to find additional sources?
Choose one of the following answers:
a. He can search Google to find more articles that may relate to his topic.
b. He can identify a multidisciplinary database to search for more articles about the topic.
c. He can locate sources listed in the references to find older, topic-related articles.