Gaya APA

Erikson, R, S. et al (1980). American Public Opinion : Its Origins, Content, And Impact (1). New York: John Wiley & Sos. Inc.

Gaya MLA

Erikson, Robertr, S.. et al. "American Public Opinion : Its Origins, Content, And Impact". 1 New York: John Wiley & Sos. Inc, 1980. Text.