APA (7th ed.) Citation

Adams, T., & Armstrong, K. (1993). When parents age: What children can do. Berkley Books.

Chicago Style (17th ed.) Citation

Adams, Tom, and Kathy Armstrong. When Parents Age: What Children Can Do. New York: Berkley Books, 1993.

MLA (9th ed.) Citation

Adams, Tom, and Kathy Armstrong. When Parents Age: What Children Can Do. Berkley Books, 1993.