Welch, S., & Comer, J. (1975). Public opinion: Its formation, measurement, and impact. Mayfield.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWelch, Susan, और John Comer. Public Opinion: Its Formation, Measurement, and Impact. Palo Alto, Calif: Mayfield, 1975.
एमएलए (9वां संस्करण) प्रशस्ति पत्रWelch, Susan, और John Comer. Public Opinion: Its Formation, Measurement, and Impact. Mayfield, 1975.
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