Frank, R. H. (2013). Falling behind: How rising inequality harms the middle class. University of California Press.
Lua i Stíl Chicago (17ú heag.)Frank, Robert H. Falling Behind: How Rising Inequality Harms the Middle Class. Berkeley: University of California Press, 2013.
Lua MLA (9ú heag.)Frank, Robert H. Falling Behind: How Rising Inequality Harms the Middle Class. University of California Press, 2013.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.