Cita APA (7a ed.)

Gil Varón, L. (1981). Migration and development a migration model for Rio Tinto 1877-1887. [s.n.].

Cita Chicago Style (17a ed.)

Gil Varón, Luis. Migration and Development a Migration Model for Rio Tinto 1877-1887. Córdoba: [s.n.], 1981.

Cita MLA (9a ed.)

Gil Varón, Luis. Migration and Development a Migration Model for Rio Tinto 1877-1887. [s.n.], 1981.