Cita APA (7a ed.)

Butler, D., & Ranney, A. (1978). Referendums: A comparative study of practice and theory. American Enterprise Institute for Public Policy Research.

Cita Chicago Style (17a ed.)

Butler, David, y Austin Ranney. Referendums: A Comparative Study of Practice and Theory. Washington: American Enterprise Institute for Public Policy Research, 1978.

Cita MLA (8a ed.)

Butler, David, y Austin Ranney. Referendums: A Comparative Study of Practice and Theory. American Enterprise Institute for Public Policy Research, 1978.