Oskamp, S. (1977). Attitudes and opinions. Prentice-Hall.
Chicago Style aipamenaOskamp, Stuart. Attitudes and Opinions. Englewood Cliffs, N.J.: Prentice-Hall, 1977.
MLA aipamenaOskamp, Stuart. Attitudes and Opinions. Prentice-Hall, 1977.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.