Dyfyniad APA

Polsby, N. W. (1989). Congress and the Presidency (4th ed.). Prentice-Hall of India.

Dyfyniad Arddull Chicago

Polsby, Nelson W. Congress and the Presidency. 4th ed. New Delhi: Prentice-Hall of India, 1989.

Dyfyniad MLA

Polsby, Nelson W. Congress and the Presidency. 4th ed. Prentice-Hall of India, 1989.

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