Sugar, J. (2014). Introduction to aging: A positive, interdisciplinary approach. Springer Publishing Company.
Lua i Stíl Chicago (17ú heag.)Sugar, Judith. Introduction to Aging: A Positive, Interdisciplinary Approach. New York, NY: Springer Publishing Company, 2014.
Lua MLA (9ú heag.)Sugar, Judith. Introduction to Aging: A Positive, Interdisciplinary Approach. Springer Publishing Company, 2014.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.