Lua APA (7ú heag.)

Welch, S., & Comer, J. (1975). Public opinion: Its formation, measurement, and impact. Mayfield.

Lua i Stíl Chicago (17ú heag.)

Welch, Susan, agus John Comer. Public Opinion: Its Formation, Measurement, and Impact. Palo Alto, Calif: Mayfield, 1975.

Lua MLA (9ú heag.)

Welch, Susan, agus John Comer. Public Opinion: Its Formation, Measurement, and Impact. Mayfield, 1975.

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