APA aipamena

Birch, A. H. (1970). British system of government (2nd. ed.). George Allen & Unwin.

Chicago Style aipamena

Birch, A. H. British System of Government. 2nd. ed. George Allen & Unwin, 1970.

MLA aipamena

Birch, A. H. British System of Government. 2nd. ed. George Allen & Unwin, 1970.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.