Cita APA (7a ed.)

Crihfield, J. B., & Campbell, H. S. (1991). Evaluating alternative regional planning models. [s.n.].

Cita Chicago Style (17a ed.)

Crihfield, John B., y Harrison S. Campbell. Evaluating Alternative Regional Planning Models. [S.l.]: [s.n.], 1991.

Cita MLA (9a ed.)

Crihfield, John B., y Harrison S. Campbell. Evaluating Alternative Regional Planning Models. [s.n.], 1991.