lue (help)↑ 62.0 62.1 Loue, Sana (2008). Encyclopedia of aging and public health : with 19 tables. New York, NY: Springer. p. 696. ISBN 978-0-387-33753-1.↑ 63.0 63.1 Moody, Harry R. (2010). Aging : concepts and controversies (6th ed. ed.). Los Angeles: Pine Forge Press. p. 158. ISBN 978-1-4129-6966-6. {{cite book}}: |edition= has extra text (help)↑ 64.0 64.1 Hales, edited by Robert I. Simon, Robert E. The American Psychiatric Publishing textbook of suicide assessment and management (2nd ed. ed.). Washington, DC: American Psychiatric Pub. p. 714. ISBN 978-1-58562-414-0. {{cite book}}: |edition= has extra text (help); |first= has generic name (help)CS1 maint: multiple names: authors list (link)↑ editor, Tarek Sobh, (2010). Innovations and advances in computer sciences and engineering (Online-Ausg. ed.). Dordrecht: Springer Verlag. p. 503. ISBN 978-90-481-3658-2. {{cite book}}: |last= has generic name (help)CS1 maint: extra punctuation (link) CS1 maint: multiple names: authors lis