Author, A. A. (Year). Chapter title. In A. A. Editor & B. B. Editor (Eds.), *Book title* (pp. pages). Publisher.
Example:
Smith, J. (2023). The impact of social media on adolescent mental health. In K. Jones & L. Brown (Eds.), *Understanding the digital age* (pp. 120-145). Sage Publications.
Key elements:
* Author, A. A.: The author of the chapter.
* (Year): The year the book was published.
* Chapter title: The title of the chapter, in sentence-case.
* In A. A. Editor & B. B. Editor (Eds.): The editors of the book. Use "Ed." if there's only one editor.
* Book title: The title of the book, italicized.
* (pp. pages): The page numbers of the chapter.
* Publisher: The name of the publishing company.
Remember to replace the bracketed information with the specifics from your source. Always double-check your citation against the latest APA style guide for the most accurate and up-to-date information.