Cita APA (7a ed.)

Van Houtven, C. H., & Norton, E. C. (2008). Informal care and medicare expenditures: Texting for heterogeneous treatment effects. [s.n.].

Cita Chicago Style (17a ed.)

Van Houtven, Courtney Harold, y Edward C. Norton. Informal Care and Medicare Expenditures: Texting for Heterogeneous Treatment Effects. [S.l.]: [s.n.], 2008.

Cita MLA (9a ed.)

Van Houtven, Courtney Harold, y Edward C. Norton. Informal Care and Medicare Expenditures: Texting for Heterogeneous Treatment Effects. [s.n.], 2008.