APA (7th ed.) Citation

Hupfeld, S. (2008). Heterogeneous ability, life expectancy, and social security: Four essays.

Chicago Style (17th ed.) Citation

Hupfeld, Stefan. Heterogeneous Ability, Life Expectancy, and Social Security: Four Essays. 2008.

MLA (9th ed.) Citation

Hupfeld, Stefan. Heterogeneous Ability, Life Expectancy, and Social Security: Four Essays. 2008.

Warning: These citations may not always be 100% accurate.