Cita APA (7a ed.)

Routasalo, P., & Pitkala, K. H. (2003). Loneliness among older people. [s.n.].

Cita Chicago Style (17a ed.)

Routasalo, Pirkko, y Kaisu H. Pitkala. Loneliness Among Older People. [S.l.]: [s.n.], 2003.

Cita MLA (9a ed.)

Routasalo, Pirkko, y Kaisu H. Pitkala. Loneliness Among Older People. [s.n.], 2003.