Cita APA (7th ed.)

Philip Martin & Chen, R. (2000). United States policies for admission of professional and technical workers: Objectives and outcomes. International Labor Office.

Cita Chicago (17th ed.)

Philip Martin i Richard Chen. United States Policies for Admission of Professional and Technical Workers: Objectives and Outcomes. Geneva: International Labor Office, 2000.

Cita MLA (9th ed.)

Philip Martin i Richard Chen. United States Policies for Admission of Professional and Technical Workers: Objectives and Outcomes. International Labor Office, 2000.