Cita APA (7a ed.)

Barfield, C. E., & Makin, J. H. (1987). Trade policy and U.S. competitiveness. American Enterprise Institute for Public Policy Research.

Cita Chicago Style (17a ed.)

Barfield, Claude E., y John H. Makin. Trade Policy and U.S. Competitiveness. Washington: American Enterprise Institute for Public Policy Research, 1987.

Cita MLA (8a ed.)

Barfield, Claude E., y John H. Makin. Trade Policy and U.S. Competitiveness. American Enterprise Institute for Public Policy Research, 1987.