Cita APA (7a ed.)

Fried, L. P., & Guralnik, J. M. (1997). Disability in older adults: Evidence regarding significance, etiology, and risk. [s.n.].

Cita Chicago Style (17a ed.)

Fried, Linda P., y Jack M. Guralnik. Disability in Older Adults: Evidence Regarding Significance, Etiology, and Risk. [S.l.]: [s.n.], 1997.

Cita MLA (9a ed.)

Fried, Linda P., y Jack M. Guralnik. Disability in Older Adults: Evidence Regarding Significance, Etiology, and Risk. [s.n.], 1997.