Dyfyniad APA

Lavrakas, P. J., & Holley, J. K. (1991). Polling and presidential election coverage. Sage Publications.

Dyfyniad Arddull Chicago

Lavrakas, Paul J., and Jack K. Holley. Polling and Presidential Election Coverage. Newbury Park, Calif.: Sage Publications, 1991.

Dyfyniad MLA

Lavrakas, Paul J., and Jack K. Holley. Polling and Presidential Election Coverage. Sage Publications, 1991.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.