Hirsh, S. P. (1971). The Courage to change: New directions for career education. Englewood Cliffs.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHirsh, Sharlene Pearlman. The Courage to Change: New Directions for Career Education. Englewood Cliffs, N. J: Englewood Cliffs, 1971.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHirsh, Sharlene Pearlman. The Courage to Change: New Directions for Career Education. Englewood Cliffs, 1971.
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