The student has summarized information from the book The Longevity Revolution: The Benefits and Challenges of Living a Long Life, by Robert N. Butler. The book was published in New York in 2008 by PublicAffairs.

Butler, R. N. The longevity revolution: The benefits and challenges of living a long life. New York, NY: PublicAffairs, 2008.

Butler, R. N. (2008). The longevity revolution: The benefits and challenges of living a long life. New York, NY: PublicAffairs.

In APA-style reference entries, the publication date is given in parentheses immediately following the author name(s).

For more help, see section 61b.