Cita APA (7a ed.)

Dénes, Z. (1980). Loneliness in old age. [s.n.].

Cita Chicago Style (17a ed.)

Dénes, Zsuzsanna. Loneliness in Old Age. [S.l.]: [s.n.], 1980.

Cita MLA (9a ed.)

Dénes, Zsuzsanna. Loneliness in Old Age. [s.n.], 1980.