Herr, E. L. (1988). Career guidance through the life span: Systematic approaches (3rd ed.). Little, Brown and Co..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHerr, Edwin L. Career Guidance Through the Life Span: Systematic Approaches. 3rd ed. Boston: Little, Brown and Co., 1988.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHerr, Edwin L. Career Guidance Through the Life Span: Systematic Approaches. 3rd ed. Little, Brown and Co., 1988.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.