Cita APA (7a ed.)

Bondevik, M., & Skogstad, A. (2000). Loneliness, religiousness, and purpose in life in the oldest old. [s.n.].

Cita Chicago Style (17a ed.)

Bondevik, Margareth, y Anders Skogstad. Loneliness, Religiousness, and Purpose in Life in the Oldest Old. [S.l.]: [s.n.], 2000.

Cita MLA (9a ed.)

Bondevik, Margareth, y Anders Skogstad. Loneliness, Religiousness, and Purpose in Life in the Oldest Old. [s.n.], 2000.