Psacharopoulos, G., & Hinchliffe, K. (1973). Returns to education: An international comparison / George Psacharopoulos ; assisted by Keith Hinchliffe ([1st ed.].). Jossey-Bass.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPsacharopoulos, George, और Keith Hinchliffe. Returns to Education: An International Comparison / George Psacharopoulos ; Assisted by Keith Hinchliffe. [1st ed.]. Amsterdam: Jossey-Bass, 1973.
एमएलए (9वां संस्करण) प्रशस्ति पत्रPsacharopoulos, George, और Keith Hinchliffe. Returns to Education: An International Comparison / George Psacharopoulos ; Assisted by Keith Hinchliffe. [1st ed.]. Jossey-Bass, 1973.
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