Cita APA (7a ed.)

Dam, F. S. A. M. v., Somers, R., & Beek-Couzijn, A. L. v. (1981). Quality of life: Some theoretical issues. [s.n.].

Cita Chicago Style (17a ed.)

Dam, F. S. A. M. van, R. Somers, y A. L. van Beek-Couzijn. Quality of Life: Some Theoretical Issues. [S.l.]: [s.n.], 1981.

Cita MLA (9a ed.)

Dam, F. S. A. M. van, et al. Quality of Life: Some Theoretical Issues. [s.n.], 1981.