APA aipamena

Sigg, O. (1997). Political Switzerland. Zurich, Switzerland: Pro Helvetia.

Chicago Style aipamena

Sigg, Oswald. Political Switzerland. Zurich, Switzerland: Pro Helvetia, 1997.

MLA aipamena

Sigg, Oswald. Political Switzerland. Zurich, Switzerland: Pro Helvetia, 1997.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.