Cita APA (7a ed.)

Forsell, Y., & Winblad, B. (1998). Feelings of anxiety and associated variables in a very elderly population. [s.n.].

Cita Chicago Style (17a ed.)

Forsell, Yvonne, y Bengt Winblad. Feelings of Anxiety and Associated Variables in a Very Elderly Population. [S.l.]: [s.n.], 1998.

Cita MLA (9a ed.)

Forsell, Yvonne, y Bengt Winblad. Feelings of Anxiety and Associated Variables in a Very Elderly Population. [s.n.], 1998.