APA aipamena

ORNSTEIN, M. (2013). A companion to survey research. Sage.

Chicago Style aipamena

ORNSTEIN, Michael. A Companion to Survey Research. Sage, 2013.

MLA aipamena

ORNSTEIN, Michael. A Companion to Survey Research. Sage, 2013.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.