Handy, R., Harwood, E. C., Dewey, J., & Ratner, J. (1973). Useful procedures of inquiry. Behavioral Research Council.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHandy, Rollo, Edward Crosby Harwood, John Dewey, और Joseph Ratner. Useful Procedures of Inquiry. Great Barrington, Massachusetts: Behavioral Research Council, 1973.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHandy, Rollo, et al. Useful Procedures of Inquiry. Behavioral Research Council, 1973.
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