Cita APA (7a ed.)

Williams, D. R. (1991). Structural change and the aggregate poverty rate. [s.n.].

Cita Chicago Style (17a ed.)

Williams, Donald R. Structural Change and the Aggregate Poverty Rate. [S.l.]: [s.n.], 1991.

Cita MLA (9a ed.)

Williams, Donald R. Structural Change and the Aggregate Poverty Rate. [s.n.], 1991.