Cita APA (7a ed.)

Praag, B. M. S. v. (1977). The perception of welfare inequality. [s.n.].

Cita Chicago Style (17a ed.)

Praag, Bernard M. S. van. The Perception of Welfare Inequality. [S.l.]: [s.n.], 1977.

Cita MLA (9a ed.)

Praag, Bernard M. S. van. The Perception of Welfare Inequality. [s.n.], 1977.