APA aipamena

Roche, J. P., & Levy, L. W. (1964). Parties and pressure groups. Harcourt, Brace & World.

Chicago Style aipamena

Roche, John Pearson, and Leonard Williams Levy. Parties and Pressure Groups. New York: Harcourt, Brace & World, 1964.

MLA aipamena

Roche, John Pearson, and Leonard Williams Levy. Parties and Pressure Groups. Harcourt, Brace & World, 1964.