Cita APA (7th ed.)

Psacharopoulos, G., & Hinchliffe, K. (1973). Returns to education: An international comparison. Jossey-Bass.

Cita Chicago (17th ed.)

Psacharopoulos, George, i Keith Hinchliffe. Returns to Education: An International Comparison. San Francisco: Jossey-Bass, 1973.

Cita MLA (9th ed.)

Psacharopoulos, George, i Keith Hinchliffe. Returns to Education: An International Comparison. Jossey-Bass, 1973.