Hitchens, D. M., Wagner, K., & Birnie, J. E. (1990). Closing the productivity gap: A comparison of Northern Ireland, the Republic of Ireland, Britain and West Germany. Avebury.
Chicago Style (17th ed.) CitationHitchens, David M., Karin Wagner, and J. E. Birnie. Closing the Productivity Gap: A Comparison of Northern Ireland, the Republic of Ireland, Britain and West Germany. Aldershot [u.a.]: Avebury, 1990.
MLA (9th ed.) CitationHitchens, David M., et al. Closing the Productivity Gap: A Comparison of Northern Ireland, the Republic of Ireland, Britain and West Germany. Avebury, 1990.
Warning: These citations may not always be 100% accurate.