Final Answer:
Carlos is reading an article and wants to find a source the author references. The citation has 2 titles, two sets of authors names and page numbers. The author is citing a book as the source.
Step-by-step explanation:
Two Titles: The presence of two titles in the citation indicates that the source is likely a book. Books often have a main title and a subtitle, contributing to the two-title format.
Two Sets of Authors' Names: The inclusion of two sets of authors' names further supports the idea that the source is a book. Books commonly have multiple authors, especially in collaborative or edited works.
Page Numbers: The mention of page numbers in the citation is a characteristic feature of books. In contrast to articles or web pages, books are paginated, and specific information can be located by referencing page numbers.
Exclusion of Other Source Types: Given the information provided, options such as articles, websites, or journals can be ruled out. The combination of two titles, two sets of authors, and page numbers strongly aligns with the structure of a book citation.